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NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations

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NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations

Edited By Irshad Anwar | Updated on Oct 07, 2023 09:12 PM IST

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations: The solutions for class 10 science chapter 1 is a part of NCERT solutions for class 10 science. Here are the all NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations. Students appearing in the board exams must go through the Class 10 Science Chapter 1 NCERT solutions. Chemical Reactions and Equations is one of the most important chapters in the NCERT Books for Class 10 Science. All the questions with detailed explanations are provided in the Chemical Reactions and Equations Class 10 Solutions. NCERT Solutions for Class 10 Science "chemical reaction and equation" will help you in board exam preparation as well as competitive exam preparation. Go through the questions and answers given in NCERT Solutions for Class 10 Science Chapter 1.

Chemistry class 10 chapter 1 Science mainly deals with writing chemical equations and balancing chemical equations. The Chapter-wise NCERT Solutions for Class 10 science have been updated as per the latest CBSE Science class 10 syllabus and guidelines. In order for students to achieve the highest possible marks on the CBSE exams, the language used in chapter 1 science class 10 Solutions is simple to understand. Also, in class 10 science chapter 1 question answer students gain a basic understanding of chemical processes, including their types and the effects of chemical oxidation in daily life.

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations

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Answers to NCERT Class 10 Science Chapter 1 – Chemical Reactions and Equations (Intext Questions and exercise)

Class 10th Science Chapter 1 Question Answer

Topic 1.1 Chemical equations:

Q 1 . Why should a magnesium ribbon be cleaned before burning in air?

Answer:

Magnesium is a very reactive metal so it reacts with oxygen to form a layer of magnesium oxide on its surface.

This layer is stable oxide so prevent further reaction of magnesium with oxygen. To remove this layer a magnesium ribbon is cleaned using sandpaper before burning in air.

Q 2. (i) Write the balanced equation for the following chemical reactions.

Hydrogen + Chlorine → Hydrogen chloride

Answer :

The balanced equation for the following chemical reactions is given as :

H_2(g)+Cl_2(g)\rightarrow 2HCl(g)

Q 2. (ii) Write the balanced equation for the following chemical reactions.

Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride

Answer:

The balanced equation for the following chemical reactions is given as :

3BaCl_2(s)+Al_2(SO_4)_3(g)\rightarrow 3BaSO_4(s)+2AlCl_3(s)

Q2. (iii) Write the balanced equation for the following chemical reactions.

Sodium + Water → Sodium hydroxide + Hydrogen

Answer:

The balanced equation for the following chemical reactions is given as :

2Na(s)+2H_2O(l)\rightarrow 2NaOH(aq)+H_2(g)

Q 3. (i) Write a balanced chemical equation with state symbols for the following reactions.

Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Answer:

The reaction of solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride is given by :

BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaCl(aq)

Q 3. (ii) Write a balanced chemical equation with state symbols for the following reactions.

Sodium hydroxide solution (in water) reacts with a hydrochloric acid solution (in water) to produce sodium chloride solution and water.

Answer:

The reaction of sodium hydroxide solution (in water) reacts with a hydrochloric acid solution (in water) to produce sodium chloride solution and water is given by :

NaOH(aq)+HCl(aq)\rightarrow NaCl (aq)+H_2O(l)

Topic 1.2 Types of chemical reactions

Q 1. (i) A solution of a substance is used for whitewashing.

Name the substance ‘X’ and write its formula

Answer:

The substance ‘X’ is calcium oxide and its formula is CaO.

Q 1.(ii) A solution of a substance is used for whitewashing.

Write the reaction of the substance named in (i) above with water

Answer:

The reaction of calcium oxide with water is given by :

CaO(s)+H_2O(l)\rightarrow Ca(OH)_2

Q 2. Why is the amount of gas collected in one of the test tubes in Activity double of the amount collected in the other? Name this gas.

Answer :

Water contains one part oxygen and two parts hydrogen. During electrolysis, oxygen and hydrogen are produced in a 1:2 ratio. In electrolysis oxygen goes in one test tube and hydrogen in a second test tube, so the amount of gas collected in the second test tube is double of first one.

NCERT Textbook Solutions for Class 10th Science Chapter 1 Chemical Reaction and Equation


Topic 1.3 Have you observed the effects of an oxidation reaction in everyday life?

Q 1. Why does the colour of copper sulphate solution change when an iron nail is dipped in it?


Answer:

The color of copper sulphate solution change when an iron nail is dipped in it because iron displaces copper from copper sulphate forming iron sulphate,which is green.

CuSO_4(aq)+Fe(s)\rightarrow FeSO_4(aq)+Cu(s)

The colour change from blue to green.

Q 2. Give an example of a double displacement reaction other than the one given in Activity.

Answer:

An example of a double displacement reaction other than the one given in Activity is :

Na_2CO_3(aq)+CaCl_2(aq)\rightarrow CaCO_3(s)+2NaCl(aq)

Q 3.(i) Identify the substances that are oxidized and the substances that are reduced in the following reactions.

4Na(s)+O_{2}\rightarrow 2Na_{2}O(s)

Answer:

4Na(s)+O_{2}\rightarrow 2Na_{2}O(s)

In the above reaction, Na is oxidised and oxygen gets reduced.

Q 3.(ii) Identify the substances that are oxidized and the substances that are reduced in the following reactions.

CuO(s)+H_{2}(g)\rightarrow Cu(s)+H_{2}O(l)

Answer:

CuO(s)+H_{2}(g)\rightarrow Cu(s)+H_{2}O(l)

In the above reaction, CuO is reduced to form Cu and hydrogen gets oxidized to water.

NCERT Class 10 Science Chapter 1 Exercise Solutions

Q 1. Which of the statements about the reaction below are incorrect?

2PbO(s)+C(s)\rightarrow 2Pb(s)+CO_{2}(g)

(a) Lead is getting reduced.

(b) Carbon dioxide is getting oxidized.

(c) Carbon is getting oxidized.

(d) Lead oxide is getting reduced.


(i) (a) and (b)

(ii) (a) and (c)

(iii) (a), (b) and (c)

(iv) all

Answer:

2PbO(s)+C(s)\rightarrow 2Pb(s)+CO_{2}(g)

In the above reaction, PbO reduces to Pb and C(carbon) gets oxidized to carbon dioxide.

Hence, statements (a) and (b) are correct.

Thus, option (i) is correct.

Q 2. Fe_{2}O_{3}+2Al\rightarrow Al_{2}O_{3}+2Fe The above reaction is an example of a

(a) combination reaction.

(b) double displacement reaction.

(c) decomposition reaction.

(d) displacement reaction

Answer :

Fe_{2}O_{3}+2Al\rightarrow Al_{2}O_{3}+2Fe

The above reaction is an example of a displacement reaction.

Hence, option (d) is correct.

Q 3. What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer.

(a) Hydrogen gas and iron chloride are produced.

(b) Chlorine gas and iron hydroxide are produced.

(c) No reaction takes place.

(d) Iron salt and water are produced.

Answer:

When dilute hydrochloric acid is added to iron fillings then hydrogen gas and iron chloride are produced.

The reaction is given as :

Fe(s)+2HCl(aq)\rightarrow FeCl_2(aq)+H_2(g)

Thus, option (a) is correct.

Q 4. What is a balanced chemical equation? Why should chemical equations be balanced?

Answer:

The chemical equation which has an equal number of atoms of all elements on both sides of the reaction is known as a balanced chemical equation.

The law of conservation of mass states that mass can neither be created nor be destroyed so chemical equations should be balanced.

Q 5. (a) Translate the following statements into chemical equations and then balance them.

Hydrogen gas combines with nitrogen to form ammonia.

Answer:

Hydrogen gas combines with nitrogen to form ammonia can be written as :

3H_2(g)+N_2(g)\rightarrow 2NH_3

Q 5 (b) Hydrogen sulphide gas burns in air to give water and sulfur dioxide.

Answer:

Hydrogen sulphide gas burns in air to give water and sulfur dioxide can be written as :

2H_2S(g)+3O_2(g)\rightarrow 2SO_2(g)+2H_2O(l)

Q 5. (c) Barium chloride reacts with aluminum sulphate to give aluminum chloride and a precipitate of barium sulphate.

Answer:

Barium chloride reacts with aluminum sulphate to give aluminum chloride and a precipitate of barium sulphate can be written as :

3BaCl_2(aq)+Al_2(SO_4)_3(aq)\rightarrow 2AlCl_3(aq)+3BaSO_4(s)

Q 5. (d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

Answer:

Potassium metal reacts with water to give potassium hydroxide and hydrogen gas is given by :

2K(s)+2H_2O(l)\rightarrow 2KOH(aq)+H_2

Q 6. (a) Balance the following chemical equations.

Balance the following chemical equations. (a)

HNO_{3}+Ca(OH)_{2}\rightarrow Ca(NO_{3})_{2}+H_{2}O

Answer:

The balanced chemical equation is given as :

2HNO_{3}+Ca(OH)_{2}\rightarrow Ca(NO_{3})_{2}+2H_{2}O

Q 6. (b) Balance the following chemical equations.

NaOH + H_{2}SO_{4} \rightarrow Na_{2}SO_{4} + H_{2}O

Answer:

The balanced chemical equation is given as :

2NaOH + H_{2}SO_{4} \rightarrow Na_{2}SO_{4} + 2H_{2}O

Q 6. (c) Balance the following chemical equations.

NaCl+AgNO_{3}\rightarrow AgCl+NaNO_{3}

Answer:

The balanced chemical equation is given as :

NaCl+AgNO_{3}\rightarrow AgCl+NaNO_{3}

Q 6. (d) Balance the following chemical equations.

BaCl_{2}+H_{2}SO_{4}\rightarrow BaSO_{4}+HCl

Answer:

A balanced chemical equation is given as :

BaCl_{2}+H_{2}SO_{4}\rightarrow BaSO_{4}+2HCl

Q 7. (a) Write the balanced chemical equations for the following reactions.

(a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

Answer:

Calcium hydroxide + Carbon dioxide →Calcium carbonate + Water

The balanced chemical equations for the above reaction is given as :

Ca(OH)_2+CO_2\rightarrow CaCO_3+H_2O

Q 7. (b) Zinc + Silver nitrate → Zinc nitrate + Silver

Answer:

Zinc + Silver nitrate → Zinc nitrate + Silver

The balanced chemical equation for the above reaction is given as :

Zn+2AgNO_3\rightarrow Zn(NO_3)_2+2Ag

Q 7. (c) Aluminium + Copper chloride → Aluminium chloride + Copper

Answer:

Aluminium + Copper chloride → Aluminium chloride + Copper

The balanced chemical equation for the above reaction is given as :

2Al+3CuCl_2\rightarrow2 AlCl_2+3Cu

Q 7. (d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride

Answer:

Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride

The balanced chemical equation for the above reaction is given as :

BaCl_2+K_2SO_4\rightarrow BaSO_4+2KCl

Q 8. (a) Write the balanced chemical equation for the following and identify the type of reaction in each case.

(a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)

Answer:

Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)

The balanced chemical equation for the above reaction is given as :

2KBr(aq)+BaI_2(aq)\rightarrow 2KI(aq)+BaBr_2

It is a double displacement reaction.

Q 8. (b) Zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)

Answer:

Zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)

The balanced chemical equation for the above reaction is given by :

ZnCO_3(s)\rightarrow ZnO(s)+CO_2(g)

It is decomposition reaction.

Q 8. (c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)

Answer:

Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)

The balanced chemical equation for the above reaction is given by :

H_2(g)+Cl_2(g)\rightarrow 2HCl(g)

It is combination reaction.

Q 8. (d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)

Answer:

Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)

The balanced chemical equation for the above reaction is given by :

Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)

It is displacement reaction.

Q 9. What does one mean by exothermic and endothermic reactions? Give examples.

Answer:

Exothermic reactions: Reactions in which heat is given out along with the products are called exothermic reactions.

Example : CH_4(g) + 2O_2 (g) \rightarrow CO_2 (g) + 2H_2O (g)

Endothermic reactions: Reactions in which energy is absorbed are known as endothermic reactions.

Example: The process of photosynthesis.

6CO_2 (g) +6H_2O(g)\rightarrow C_6H_1_2O_6(aq) + 6O_2 (g)

Q 10. Why is respiration considered an exothermic reaction? Explain .

Answer:

We know that energy is required to support life. We get energy from the food we eat.

The large molecules of food are broken into a simpler substance like glucose during digestion.

Glucose and oxygen react to provide energy to the body. This reaction is a combination reaction named as respiration. In this whole process, energy is released so respiration is considered an exothermic reaction.

C_6H_1_2O_6(aq)+6O_2\rightarrow 6CO_2(g)+6H_2O(l)+Energy

Q 11. Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.

Answer:

In decomposition reactions, we can observe that a single reactant breaks down to give simpler products. This reaction source of energy. Whereas, in combination reaction two or more substances combine to give a product and energy is released in this reaction.

Hence, decomposition reactions called the opposite of combination reactions.

Example :

decomposition reaction : 2H_2O(l)\rightarrow 2H_2(g)+O_2(g)

and the combination reaction : 2H_2(g)+O_2(g)\rightarrow 2H_2O(l)+Energy

Q 12. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

Answer:

The decomposition reaction by heat:

2FeSO_4(s)\rightarrow Fe_2O_3(s)+SO_2(g)+SO_3

The decomposition reaction by light :

2AgCl(s)\rightarrow 2Ag(s)+Cl_2(g)

The decomposition reaction by electricity :

2Al_2O_3(aq)\rightarrow 4Al(s)+3O_2(g)

Q 13. What is the difference between displacement and double displacement reactions? Write equations for these reactions.

Answer:

When an element displaces another element from its compound, a displacement reaction occurs.

Example : Fe(s) + CuSO_4(aq) \rightarrow FeSO_4(aq) + Cu(s)

Two different atoms or groups of atoms (ions) are exchanged in a double displacement reaction.

Example : Na_2SO_4(aq) + BaCl_2(aq) \rightarrow BaSO_4(s) + 2NaCl(aq)

Q 14. In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.

Answer:

In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. The reaction involved can be written as :

2AgNO_3(aq)+Cu(s)\rightarrow Cu(NO_3)_2(aq)+2Ag(s)

Q 15. What do you mean by a precipitation reaction? Explain by giving examples.

Answer:

Any reaction that produces a precipitate is called a precipitation reaction.

Example : Na_2CO_3(aq)+CaCl_2(aq)\rightarrow CaCO_3(s)+2NaCl(aq)

Here, we have CaCO_3 as precipitate so it is a precipitation reaction.

Q 16.







(a)


Explain the following in terms of gain or loss of oxygen with two examples each. (a) Oxidation







Oxidation is a reaction in which the gain of oxygen or loss of hydrogen can be observed.

Example : 2Cu + O_2 \rightarrow 2CuO

CO_2+H_2\rightarrow CO+H_2O

Q 16. (b) Reduction

Answer:

The reaction in which the loss of oxygen or gain of hydrogen can be observed is known as reduction reaction.

Example : CuO +H_2 \rightarrow Cu+H_2 O

ZnO + C\rightarrow Zn+ CO

Q 17. A shiny brown coloured element ‘X’ on heating in the air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

Answer:

A shiny brown colored element is copper (Cu) and on heating, in the air it becomes black in colour because of the formation of copper oxide(CuO).

2Cu+O_2\rightarrow 2CuO

Q 18. Why do we apply paint on iron articles?

Answer:

To prevent iron from rusting paint is applied to iron articles. After applying paint iron articles are not in contact with moisture and air and hence rusting is prevented.

Q 19. Oil and fat containing food items are flushed with nitrogen. Why?

Answer:

We know that nitrogen is an inert gas and does not react with the oil and fat-containing food. Whereas, other gases like oxygen react with the oil and fat-containing food and make them rancid. Hence, to remove oxygen and prevent food from acidity food items are flushed with nitrogen.

Q 20.(a) Explain the following terms with one example each.

Corrosion

Answer:

Corrosion is a process in which metals deteriorate due to chemical reaction with moisture, air, and chemicals. Rusting of iron is a major example of corrosion. Iron corrodes in the presence of moisture and air.

4Fe+3O_2+H_2O\rightarrow 2Fe_2O_3.H_2O

Q 20. (b) Rancidity

Answer:

(b) Rancidity

The process of oxidation of fats and oils which can be noticed by a change in color, smell, and taste is known as rancidity.

Example: When butter is kept in the open atmosphere than its smell and taste change which results in rancidity.






Chapter-Wise NCERT Solutions for Class 10 Science

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Science Class 10: Important Formulas and Diagrams + eBook link

Important Formulas from Chapter 1 Science Class 10 are listed below. Go through them to make your basic concept more concrete.

TYPES OF CHEMICAL REACTIONS

  1. Combination or Addition reaction: A + B → AB

  2. Decomposition Reaction: AB → A + B

  3. Displacement Reaction: A + BC → AC + B

  4. Double Displacement Reaction or Precipitation Reaction:

AgNO3 + NaCl → AgCl(s) + NaNO3

  1. Oxidation and Reduction reactions:

1689918712213

For more, Download the - NCERT Class 10 Science: Chapterwise Important Formulas, Diagrams, And Points

Also Read

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations - Topics and Subtopics

Important topics and subtopics from Science Class 10 Chapter 1 are given below:

  • Chemical reactions and equations
  • Chemical equations
  • Types of chemical equations
  • Effects of oxidation reactions in everyday life?

The NCERT Solutions for Class 10 Science Chapter 1 have good weightage, and there will be around four questions asked from this chapter every year. The types of questions that appear in chemical reaction and equation class 10 are mostly practice-based questions. Thorough knowledge and good practice will help learners score full marks on the questions asked in this chapter. Science Class 10 Chapter 1 NCERT Solutions are easy to access and download.

Benefits of NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations:

  • Through the Class 10 Science Chapter 1 question answer, you will also get to know why balancing between chemical equations is important.
  • The Class 10 Science Chapter 1 NCERT Solutions gives an overview of the main concepts mentioned in the chapter and helps you get well versed in important topics such as writing chemical equations and balancing them.
  • NCERT Solutions for Class 10 Science Chapter 1 PDF Download will be made available in a short time. Till then, you can save the webpage to practice the Science Class 10 Chapter 1 question answer offline.
  • These NCERT Class 10 Science Chapter 1 solutions are explained by the experts.

Highlights of NCERT Solutions for Class 10 Science Chapter 1: Chemical Reactions and Equations

The highlights for the Class 10 Science Chapter 1 solution PDF are given below:

  • The NCERT (CBSE) Syllabus and Books are strictly followed in the class 10 science chapter 1 question answer.
  • The Class 10 Chapter 1 Science are easy-to-understand and comprehensive
  • On this page, you will find clear and concise Chemical Reactions and Equations Class 10 questions answers.
  • The solutions given for chemical equation class 10 help clear doubt and give in-depth knowledge of concepts.
  • The NCERT Solutions Class 10 Science Chapter 1 are prepared by subject matter experts in the easiest possible way.
  • All the exercise questions and in-text solved questions are available for 10 grade science chapter 1.
  • Stepwise solutions are provided here for 10th Class science chapter 1.
  • Diagrams are provided wherever required for a better understanding in Science Class 10 Chapter 1 question answer
  • class 10 chemistry chapter 1 solutions will help you to score good marks in board exams.

How to Use NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations?

  • Firstly go through the Science Chapter 1 Class 10 and learn all the concepts. Afterwards, move to the NCERT Class 10 Science Solutions Chapter 1.

  • Practice all the diagrams, equations and definitions regularly to have a strong understanding of the Chapter 1 Science Class 10.

  • To check your preparation level, you can check previous year question papers from the Class 10 board exams and check if you are able to solve all the questions with the help of NCERT solutions.

  • If you have any questions that you are not able to find in the NCERT solutions for Class 10 Science Chapter 1, Well, go ahead and ask your question in the discuss doubts section. The experts will explain to you the solutions.

    NCERT Solutions for Class 10 for other subjects

  • NCERT Solutions for Class 10 Maths
  • Also Check NCERT Books and NCERT Syllabus here:

Frequently Asked Question (FAQs)

1. What are the important topics of Class 10 Science Chapter 1 Chemical Reactions and Equations?
  • Chemical equations

  • Writing a chemical equation

  • Balanced chemical equations

  • Types of chemical reactions

  • Effects of oxidation reactions in everyday life

2. How can I get the NCERT Class 10 Science solution offline?

NCERT Solutions for Class 10 Science Chapter 1 PDF Download is not available right now. But you can save the webpage to get the solutions offline.

3. What is the weightage of chapter Chemical Reactions and Equations in CBSE Class 10 board final exam?

Weightage of chapter Chemical Reactions and Equations in CBSE class 10 board final exam is around 5 marks. To solve questions refer to NCERT book and NCERT exemplar. Also refer to CBSE previous year papers of Class 10 CBSE board.

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A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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Geotechnical engineer

The role of geotechnical engineer starts with reviewing the projects needed to define the required material properties. The work responsibilities are followed by a site investigation of rock, soil, fault distribution and bedrock properties on and below an area of interest. The investigation is aimed to improve the ground engineering design and determine their engineering properties that include how they will interact with, on or in a proposed construction. 

The role of geotechnical engineer in mining includes designing and determining the type of foundations, earthworks, and or pavement subgrades required for the intended man-made structures to be made. Geotechnical engineering jobs are involved in earthen and concrete dam construction projects, working under a range of normal and extreme loading conditions. 

3 Jobs Available
Cartographer

How fascinating it is to represent the whole world on just a piece of paper or a sphere. With the help of maps, we are able to represent the real world on a much smaller scale. Individuals who opt for a career as a cartographer are those who make maps. But, cartography is not just limited to maps, it is about a mixture of art, science, and technology. As a cartographer, not only you will create maps but use various geodetic surveys and remote sensing systems to measure, analyse, and create different maps for political, cultural or educational purposes.

3 Jobs Available
Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

4 Jobs Available
Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

3 Jobs Available
Finance Executive
3 Jobs Available
Operations Manager

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

3 Jobs Available
Investment Director

An investment director is a person who helps corporations and individuals manage their finances. They can help them develop a strategy to achieve their goals, including paying off debts and investing in the future. In addition, he or she can help individuals make informed decisions.

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

3 Jobs Available
Plumber

An expert in plumbing is aware of building regulations and safety standards and works to make sure these standards are upheld. Testing pipes for leakage using air pressure and other gauges, and also the ability to construct new pipe systems by cutting, fitting, measuring and threading pipes are some of the other more involved aspects of plumbing. Individuals in the plumber career path are self-employed or work for a small business employing less than ten people, though some might find working for larger entities or the government more desirable.

2 Jobs Available
Construction Manager

Individuals who opt for a career as construction managers have a senior-level management role offered in construction firms. Responsibilities in the construction management career path are assigning tasks to workers, inspecting their work, and coordinating with other professionals including architects, subcontractors, and building services engineers.

2 Jobs Available
Urban Planner

Urban Planning careers revolve around the idea of developing a plan to use the land optimally, without affecting the environment. Urban planning jobs are offered to those candidates who are skilled in making the right use of land to distribute the growing population, to create various communities. 

Urban planning careers come with the opportunity to make changes to the existing cities and towns. They identify various community needs and make short and long-term plans accordingly.

2 Jobs Available
Highway Engineer

Highway Engineer Job Description: A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

2 Jobs Available
Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems. 

2 Jobs Available
Naval Architect

A Naval Architect is a professional who designs, produces and repairs safe and sea-worthy surfaces or underwater structures. A Naval Architect stays involved in creating and designing ships, ferries, submarines and yachts with implementation of various principles such as gravity, ideal hull form, buoyancy and stability. 

2 Jobs Available
Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

6 Jobs Available
Veterinary Doctor
5 Jobs Available
Pathologist

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

5 Jobs Available
Speech Therapist
4 Jobs Available
Gynaecologist

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth. 

4 Jobs Available
Oncologist

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

3 Jobs Available
Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

3 Jobs Available
Hospital Administrator

The hospital Administrator is in charge of organising and supervising the daily operations of medical services and facilities. This organising includes managing of organisation’s staff and its members in service, budgets, service reports, departmental reporting and taking reminders of patient care and services.

2 Jobs Available
Actor

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs. 

4 Jobs Available
Acrobat

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

3 Jobs Available
Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

3 Jobs Available
Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

3 Jobs Available
Choreographer

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

2 Jobs Available
Videographer
2 Jobs Available
Multimedia Specialist

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications. 

2 Jobs Available
Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

2 Jobs Available
Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism, Advertising, Marketing Management. Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook. 

5 Jobs Available
Journalist

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

3 Jobs Available
Publisher

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

3 Jobs Available
Vlogger

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion. 

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article. 

3 Jobs Available
Editor

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

3 Jobs Available
Linguist

Linguistic meaning is related to language or Linguistics which is the study of languages. A career as a linguistic meaning, a profession that is based on the scientific study of language, and it's a very broad field with many specialities. Famous linguists work in academia, researching and teaching different areas of language, such as phonetics (sounds), syntax (word order) and semantics (meaning). 

Other researchers focus on specialities like computational linguistics, which seeks to better match human and computer language capacities, or applied linguistics, which is concerned with improving language education. Still, others work as language experts for the government, advertising companies, dictionary publishers and various other private enterprises. Some might work from home as freelance linguists. Philologist, phonologist, and dialectician are some of Linguist synonym. Linguists can study French, German, Italian

2 Jobs Available
Public Relation Executive
2 Jobs Available
Travel Journalist

The career of a travel journalist is full of passion, excitement and responsibility. Journalism as a career could be challenging at times, but if you're someone who has been genuinely enthusiastic about all this, then it is the best decision for you. Travel journalism jobs are all about insightful, artfully written, informative narratives designed to cover the travel industry. Travel Journalist is someone who explores, gathers and presents information as a news article.

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
QA Manager
4 Jobs Available
Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product. 

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Production Manager
3 Jobs Available
Merchandiser
2 Jobs Available
QA Lead

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans. 

2 Jobs Available
Metallurgical Engineer

A metallurgical engineer is a professional who studies and produces materials that bring power to our world. He or she extracts metals from ores and rocks and transforms them into alloys, high-purity metals and other materials used in developing infrastructure, transportation and healthcare equipment. 

2 Jobs Available
Azure Administrator

An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems. 

4 Jobs Available
AWS Solution Architect

An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party. 

4 Jobs Available
QA Manager
4 Jobs Available
Computer Programmer

Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.

3 Jobs Available
ITSM Manager
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Information Security Manager

Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack 

3 Jobs Available
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