NCERT Exemplar Class 11 Biology Solutions Chapter 22 Chemical Coordination and Integration

NCERT Exemplar Class 11 Biology Solutions Chapter 22 Chemical Coordination and Integration

Edited By Irshad Anwar | Updated on Mar 29, 2025 02:59 PM IST

NCERT Exemplar Class 11 Biology Solutions Chapter 22: The chapter focuses on the endocrine system and its role in maintaining homoeostasis through hormone secretion. This chapter explains the structure, functions and regulation of several endocrine glands, including the pituitary and the hypothalamus. Class 11 Biology Chemical Coordination and Integration provides in-depth explanations of how hormones interact with target organs to regulate metabolism, growth and development. Practising the MCQs helps students understand key concepts of hormone action and feedback mechanisms. Studying the Exemplar question and answers improves the understanding of disorders such as diabetes and hypothyroidism. The NCERT exemplar solutions provide a variety of objective-type questions and their answers to test the application of concepts in real-life scenarios.

This Story also Contains
  1. NCERT Exemplar Class 11 Solutions Biology Chemical Coordination and Integration Solutions
  2. NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Multiple Choice Questions:
  3. NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Very Short Answer Type Questions:
  4. NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Short Answer Type Questions:
  5. NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Long Answer Type Questions:
  6. Topics and Sub-topics of NCERT Exemplar Class 11 Biology Solutions Chapter 22
  7. NCERT Exemplar Chapter Wise Class 11 Biology Solutions
NCERT Exemplar Class 11 Biology Solutions Chapter 22 Chemical Coordination and Integration
NCERT Exemplar Class 11 Biology Solutions Chapter 22 Chemical Coordination and Integration

Studying the MCQs regularly enhances analytical thinking and accuracy exams by consistently working through these resources. Students can ensure a strong understanding of Chemical Coordination and Integration, and improve their overall biology scores. These exemplar solutions give an extra edge to the students while attempting the problems given in the NCERT Class 11 Biology Book.

NCERT Exemplar Class 11 Solutions Biology Chemical Coordination and Integration Solutions

The solved exemplar questions are given below-

NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Multiple Choice Questions:

Question:1

Select the right match of the endocrine gland and its hormones among the options given below.

Column I

Column II

A. Pineal

i) Epinephrine

B.Thyroid

ii) Melatonin

C. Ovary

iii) Estrogen

D. Adrenal Medulla

iv) Tetraiodothyronine


Options:
(a) A – (iv), B – (ii), C – (iii), D – (i)
(b) A – (ii), B – (iv), C – (i), D – (iii)
(c) A – (iv), B – (ii), C – (i), D – (iii)
(d) A – (ii), B – (iv), C – (iii), D – (i)

Answer:

(d) A – (ii), B – (iv), C – (iii), D – (i) is the correct option

Question:2

Which of the following hormones is not secreted by the anterior pituitary gland?
(a) Growth hormone
(b) Follicle-stimulating hormone
(c) Oxytocin
(d) Adrenocorticotropic hormone

Answer:

The answer is the option (c) Oxytocin.
Explanation: Oxytocin is produced by the posterior pituitary gland.

Question:3

Mary is about to face an interview. But during the first five minutes before the interview she experiences sweating, increased rate of heartbeat, respiration etc. Which hormone is responsible for her restlessness?

(a) Estrogen and progesterone
(b) Oxytocin and vasopressin
(c) Adrenaline and noradrenaline
(d) Insulin and glucagon

Answer:

The answer is the option (c) Adrenaline and noradrenaline.

Explanation: Adrenaline and noradrenaline are also called stress hormones and can be responsible for restlessness.

Question:4

The steroid hormone responsible for balance of water and electrolytes in our body is
(a) Insulin
(b) Melatonin
(c)Testosterone
(d) Aldosterone

Answer:

The answer is the option (d) Aldosterone.
Explanation: Aldosterone stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions; thus it is responsible for maintaining water balance and electrolytes in our bodies.

Question:5

Thymosin is responsible for

(a) Raising the blood sugar level

(b) Raising the blood calcium level

(c) Differentiation of T lymphocytes

(d) Decrease in RBC

Answer:

The answer is the option (c) Differentiation of T lymphocytes.

Question:6

In the mechanism of action of a protein hormone, one of the second messengers is
a. Cyclic AMP
b. Insulin
c. T3
d. Gastrin

Answer:

The answer is the option (a) Cyclic AMP
Explanation: Hormones which react with membrane-bound receptors and generally do not enter the target cell, but creates second messengers (Cyclic AMP, IP3, Ca++, etc.)

Question:7
Leydig cells produce a group of hormones called
(a) Androgens
(b) Estrogens
(c) Aldosterone
(d) Gonadotropins

Answer:

The answer is the option (a) Androgens.

Question:8

The Corpus luteum secretes a hormone called
(a) Prolactin
(b) Progesterone
(c) Aldosterone
(d) Testosterone

Answer:

The answer is the option (b) Progesterone.

Question:9

Cortisol is secreted from
(a) Pancreas
(b) Thyroid
(c) Adrenal
(d) Thymus

Answer:

The answer is the option (c) Adrenal

Question:10

A hormone responsible for the normal sleep-wake cycle is
(a) Epinephrine
(b) Gastrin
(c) Melatonin
(d) Insulin

Answer:

The answer is the option (c) Melatonin.

Question:11

Hormones are called chemical signals that stimulate specific target tissues. Which is the correct location of these receptors in case of protein hormones?

(a) Extracellular matrix
(b) Blood
(c) Plasma membrane
(d) Nucleus

Answer:

The answer is the option (c) Plasma membrane.

Question:12

Choose the correct option among the following:

Column A

Column B

A.

Epinephrine

(i)

Stimulates muscle growth

B.

Testosterone

(ii)

Decrease in blood pressure

C.

Glucagon

(iii)

Decrease in liver glycogen content

D.

Atrial natriuretic factor

(iv)

Increases heartbeat

Options:
(a) A—(ii), B—(i), C—(iii), D—(iv)
(b) A—(iv), B—(i)„ C—(iii), D—(ii)
(c) A—(i), B—(ii), C—(iii), D—(iv)
(d) A—(i), B—(iv), C—(ii), D—(iii)

Answer:

The answer is the option (b) A—(iv), B—(i), C—(iii), D—(ii).

Question:13

Which of the following does not play any role in calcium balance in the human body?
(a) Vitamin D
(b) Parathyroid hormone
(c) Thyrocalcitonin
(d) Thymosin

Answer:

The answer is the option (d) Thymosin.
Explanation: Thymosin is responsible for the differentiation of T-lymphocytes in the body.

Question:14

Which of the following organs in mammals does not consist of a central 'medullary' region surrounded by a cortical region?
(a) Ovary
(b) Liver
(c) Adrenal
(d) Kidney

Answer:

The answer is the option (b) Liver.

Question:15

Which of the following conditions is not linked to a deficiency of thyroid hormone?
(a) Cretinism
(b) Goitre
(c) Myxedema
(d) Exophthalmos

Answer:

The answer is the option (d) Exophthalmos.
Explanation: Exophthalmos happens due to hyperthyroidism.

NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Very Short Answer Type Questions:

Question:1

There are many endocrine glands in the human body. Name the gland which is absent in males and the one which is absent in females.

Answer:

Ovaries are glands which are absent in males and testis is absent in females.

Question:2

Which of the two adrenocortical layers, zona glomerulosa and zona reticularis lies outside enveloping the other?

Answer:


The outermost layer is the Zona glomerulosa, and the innermost layer of the adrenal gland is the zona reticularis.

Question:3

What is erythropoiesis? Which hormone stimulates it?

Answer:

The process of formation of RBCs from the bone marrow is known as erythropoiesis. It is stimulated by the hormone called erythropoietin.

Question:4

Name the only hormone secreted by pars intermedia of the pituitary gland.

Answer:
Melanocyte Stimulating Hormone (MSH) is the only hormone secreted by pars intermedia of the pituitary gland.

Question:5

Name the endocrine gland that produces calcitonin and mention the role played by this hormone.

Answer:

The thyroid gland produces calcitonin or thyrocalcitonin. Calcitonin hormone regulates blood calcium levels in the body.

Question:6

Name the hormone that helps in cell-mediated immunity.

Answer:
Thymosin is the hormone that helps in cell-mediated immunity.

Question:7

What is the role of the second messenger in the mechanism of protein hormone action?

Answer:
The Second messenger helps regulate cell metabolism. The hormones which react with the membrane-bound receptors generally do not enter the cell. Instead of that, they create second messengers and in doing so, affect the functioning of the target cells.

Question:8

State whether true or false:
(a) The gastrointestinal tract, kidney and heart also produce hormones.
(b) Pars distalis produces six trophic hormones.
(c) B-lymphocytes provide cell-mediated immunity.
(d) Insulin resistance results in a disease called diabetes mellitus.

Answer:
(a) True
(b) True
(c) False
(d) True

Question:10

Correct the following statements by replacing the term underlined.
(a) Insulin is a steroid hormone.
(b) TSH is secreted from the corpus luteum.
(c) Tetraiodothyronine is an emergency hormone.
(d) The pineal gland is located on the anterior part of the kidney.

Answer:
(a) Insulin is a peptide hormone.
(b) TSH is secreted from the anterior pituitary gland.
(c) Tetraiodothyronine is a maintenance hormone.
(d) The adrenal gland is located on the anterior part of the kidney.

Question:11

Rearrange the following hormones in Column I so as to match with their chemical nature in Column II.

Column I

Column II

(a) Oxytocin

i) Amino acid derivative

(b) Epinephrine

ii) Steroid

(c) Progesterone

(iii)Protein

(d) Growth hormone

(iv) Peptide


Answer:

The answer is the option (a) - (iii), (b) - (i), (c ) - (ii), (d) - (iv)

NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Short Answer Type Questions:

Question:1

What is the role played by luteinizing hormones in males and females respectively?

Answer:

Luteinizing hormones play the following roles: -

  • In Males: They help in stimulating the Leydig cell production of testosterone.

  • In Females: They help in stimulating the process of ovulation.

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Question:2

What is the role of the second messenger in hormone action?

Answer:

Extracellular substances such as some hormones which do not cross the plasma membrane are called the first messenger. In cases like these, second messengers are produced so that they can enter the cell. Second messengers trigger various physiological changes in a cell. Hence, second messengers play the role of connecting the signals from the first messengers.

Hormone action

Question:3

On an educational trip to Uttaranchal, Ketki and her friends observed that many local people were having swollen necks. Please help Ketki and her friends to find out the solutions to the following questions.
(a) Which probable disease are these people suffering from?
(b) How is it caused?
(c) What effect does this condition have on pregnancy?

Answer:
(a) The people are suffering from a health condition called the goitre.
(b) Goitre is caused by dietary iodine deficiency.
(c) If a pregnant woman is suffering from goitre, which is associated with hypothyroidism; it can have adverse effects on the foetus. Goitre causes defective development and maturation of the growing baby leading to stunted growth, mental retardation, abnormal skin and deaf-mutism.

Question:4

George comes on a vacation to India from the US. The long journey disturbs his biological system, and he suffers from jet lag. What is the cause of his discomfort?

Answer:
The body's biological clock follows a set pattern during the 24 hours called the circadian rhythm. If a person travels through different time zones through long hours of journey, his circadian rhythm gets troubled. As a result, the person suffers from jet lag.
This causes sleep disturbance, bowel habits, anorexia, etc.

Question:5

Inflammatory responses can be controlled by a certain steroid. Name the steroid and the source from which it is obtained and also mention its other important functions.

Answer:

Inflammatory responses are controlled by a steroid called cortisol. Cortisol hormone is secreted by the adrenal cortex. Cortisol is one of the many corticoids secreted by the adrenal gland. It also stimulates RBC production and influences or modulates a lot of changes that happen in the body in response to stress etc.

Question:6

Old people have weak immune systems What could be the reason?

Answer:

The thymus gland in the body does the job of secreting the hormone called thymosin which plays a big role in the differentiation of T-lymphocytes. T-lymphocytes are responsible for cell mediation for immune response. In old people, because of their age, their thymus gland starts to degenerate, which results in reduced production of thymosin. Thus, old people have weak immune systems.

Question:7

What are the effects of hypothyroidism (observed during pregnancy) on the development and maturation of a growing baby?

Answer:

If a pregnant woman is suffering from hypothyroidism; it can have adverse effects on the development and maturation of the foetus. Their foetus's growth can be stunted, which can result in an underweight newborn. The effects of hypothyroidism remain after birth and do not go away. The baby's brain may not develop, and they may show signs of mental retardation. The baby can also develop abnormal skin and deaf-mutism.

Question:8

Mention the difference between hypothyroidism and hyperthyroidism.

Answer:

Hypothyroidism

Hyperthyroidism

Requires less than normal secretion of thyroid hormone.

Requires more than normal production of thyroid hormone.

Decreases metabolic rate in the body.

Increases metabolic rate.

It may happen because of iodine deficiency in the body.

It may happen because of the development of tumours or nodules in the thyroid gland.

Symptoms are fatigue, dry hair, dry skin, muscle cramps, decreased menstrual flow, etc.

Symptoms are feeling hot, forgetfulness, sweating, increased heart rate, disturbed bowel movement, etc.


Question:9

You have learnt that a characteristic feature of endocrine systems is the presence of feedback loops. By what is meant if hormone A stimulates gland 'X' to secrete hormone B, the production of 'A' could be modified when the level of B changes in our blood. An example is the relationship between the hormones LH and estrogen (E2). An old woman exhibits the following features.

High levels of LH in the blood but low levels of E2 in the blood. Another woman exhibits a high level of LH in the blood and also a high level of E2 in the blood. Where lies the defect in both these women? Provide a suitable diagram to support the answer.

Answer:

In the body, the level of LH in the blood is generally low before puberty, and it starts to increase during the reproductive phase. LH levels in the blood during the reproductive phase are dependent on the specific phase of the ovulation cycle that the woman is going through. When ovulation is about to happen, the LH level peaks, and so does the level of E2. This displays normal conditions.

But in the case of older women, LH level in the bodies is higher, and it goes along with the low levels of E2. A low level of E2 displays the end of the reproductive phase. It is known that menopause marks the end of the reproductive phase for the woman. After menopause, no or negligible oocytes are left in the ovary. Hence, LH is not being utilized the way it was during the reproductive phase. This explains the reason for the increased level of LH in blood in older women.
Feedback inhibition of hormone action

NCERT Exemplar Class 11 Biology Chemical Coordination and Integration Solutions- Long Answer Type Questions:

Question:1

A milkman is very upset one morning as his cow refuses to give any milk. The milkman's wife gets the calf from the shed. On fondling by the calf, the cow gave sufficient milk. Describe the role of the endocrine gland and the pathway associated with this response.

Answer:

Ans. Milk secretion in mammals is provoked by the hormone known as oxytocin which works on positive feedback mechanisms.
(a) When the calf suckles on the cow's udder; it stimulates the nerve impulses.
(b) Nerve impulses in order to send signals to the hypothalamus, which starts producing oxytocin in the body.
(c) Therefore, Oxytocin results in the contraction of the smooth muscles around the alveoli (in the cow's udder) and hence milk is released.

Udder (suckling stimulus) $\rightarrow$ Hypothalamus$\rightarrow$ Posterior lobe of pituitary $\rightarrow$Oxytocin (in the blood)$\rightarrow$ Udder (Smooth muscles) $\rightarrow$ Milk flow.

Question:2

A sample of urine was diagnosed to contain a high content of glucose and ketone bodies. Based on this observation, answer the following:

(a) Which endocrine gland and hormone is related to this condition?
(b) Name the cells on which this hormone acts.
(c) What is the condition called, and how can it be rectified?

Answer:
(a) The pancreas is the endocrine gland and insulin is the hormone which is related to this condition.
(b) Insulin acts on hepatocytes and adipocytes.
(c) This condition is called diabetes. This can be controlled by changing some dietary habits, medications etc. In some cases, the patient may need to take insulin on a daily basis.

Question:3

Calcium plays a very important role in the formation of bones. Elaborate on the role of endocrine glands and hormones responsible for maintaining Calcium homeostasis.

Answer:

The movement of calcium ions between the body fluids and cells is known as calcium homoeostasis. Calcium plays a critical role in different metabolic processes and is also an important part of the bones. Hence, maintaining the levels of calcium in body fluids, cells and bones is very highly important. Both the thyroid and parathyroid hormones play great roles in calcium homeostasis.

Question:4

Illustrate the differences between the mechanism of action of a protein and a steroid hormone.

Answer:

Protein hormones

Steroid hormones

They correspond with the membrane-bound receptors.

They correspond with the intracellular receptors.

They give rise to a second messenger for further action.

They do not give rise to second messengers.

The effect of these hormones changes cellular metabolism.

The effect of these hormones changes gene expression or chromosome function.

Examples: insulin, glucagon, etc

Examples: cortisol, testosterone etc.

Action of protein hormones

Action of steroid hormones


Question:5

Hypothalamus is a super master endocrine gland. Elaborate.

Answer:

Ans. The hypothalamus consists of many groups of neurosecretory cells which are called nuclei which produce hormones. These hormones control the synthesis and production of pituitary hormones. The hypothalamus produces two types of hormones, i.e. releasing hormones (that revivify the secretion of pituitary hormones) and inhibiting hormones (which inhibit the secretion of pituitary hormones) The Pituitary gland produces the maximum number of hormones in the body, But many hormones secreted from the pituitary gland regulate the function of other endocrine glands in the body. In fact, all the other endocrine glands are controlled by the hormones which are produced by the pituitary gland. Thus, the pituitary gland is popularly known as the 'Master Gland' But the hormones secreted by the hypothalamus regulate the production of hormones from the pituitary gland. Due to this, the hypothalamus can also be known as the 'Super Master Gland' of the body.

Also, Read NCERT Solution subject-wise

Topics and Sub-topics of NCERT Exemplar Class 11 Biology Solutions Chapter 22

The important topics and subtopics of the chapter are:-

1. Endocrine Glands and Hormones

2. Human Endocrine System

  • The Hypothalamus
  • The Pituitary Gland
  • The Pineal Gland
  • Thyroid Gland
  • Parathyroid Gland
  • Thymus
  • Adrenal Gland
  • Pancreas
  • Testis
  • Ovary

3. Hormones of Heart, Kidney and Gastrointestinal Tract,

4. Mechanisms of Hormone Action.

NCERT Exemplar Chapter Wise Class 11 Biology Solutions

The biology chapter-wise exemplar solutions of Class 11 are given below:

NCERT Exemplar Solutions for Class 11 Biology Chapter 1 The Living World
NCERT Exemplar Solutions for Class 11 Biology Chapter 2 Biological Classification
NCERT Exemplar Solutions for Class 11 Biology Chapter 3 Plant Kingdom
NCERT Exemplar Solutions for Class 11 Biology Chapter 4 Animal Kingdom
NCERT Exemplar Solutions for Class 11 Biology Chapter 5 Morphology of Flowering Plants
NCERT Exemplar Solutions for Class 11 Biology Chapter 6 Anatomy of Flowering Plants
NCERT Exemplar Solutions for Class 11 Biology Chapter 7 Structural Organisation in Animals
NCERT Exemplar Solutions for Class 11 Biology Chapter 8 Cell The Unit of Life
NCERT Exemplar Solutions for Class 11 Biology Chapter 9 Biomolecules
NCERT Exemplar Solutions for Class 11 Biology Chapter 10 Cell Cycle and Cell Division
NCERT Exemplar Solutions for Class 11 Biology Chapter 11 Transport in Plants
NCERT Exemplar Solutions for Class 11 Biology Chapter 12 Mineral Nutrition
NCERT Exemplar Solutions for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants
NCERT Exemplar Solutions for Class 11 Biology Chapter 14 Respiration in Plants
NCERT Exemplar Solutions for Class 11 Biology Chapter 16 Digestion and Absorption
NCERT Exemplar Solutions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases
NCERT Exemplar Solutions for Class 11 Biology Chapter 18 Body Fluids and Circulation
NCERT Exemplar Solutions for Class 11 Biology Chapter 19 Excretory Products and their Elimination
NCERT Exemplar Solutions for Class 11 Biology Chapter 20 Locomotion and Movement
NCERT Exemplar Solutions for Class 11 Biology Chapter 21 Neural Control and Coordination
NCERT Exemplar Solutions for Class 11 Biology Chapter 22 Chemical Coordination and Integration
















The NCERT Class 11 Biology Exemplar Solutions provide well-written explanations that are written by subject experts and help the student remember everything with ease. Solving these questions helps to strengthen their understanding and increase their confidence in exams.

NCERT Exemplar Class 11 Solutions


In NCERT Exemplar Class 11 Biology Solutions of Chapter 22, the various aspects related to chemical coordination such as the types of hormones, mechanism of hormone action and feedback regulation are well explained.

Must Read NCERT Notes subject-wise

The NCERT Exemplar Class 11 Biology Solutions of Chapter Chemical Coordination and Integration provides a detailed study of the endocrine system, highlighting hormone action, feedback regulation, and their physiological effects. The chapter covers key topics such as the hypothalamic-pituitary axis, adrenal hormones, and insulin regulation that are important for metabolic balance. Practising the MCQs strengthens conceptual clarity on hormonal functions and disorders. By solving the important questions of class 11 Biology Chemical Coordination and Integration, students can assess their understanding of the topic which ensures a structured revision approach, that helps the students both in boards as well as competitive exams.

Also Check NCERT Books and NCERT Syllabus here

Frequently Asked Questions (FAQs)

1. Who can benefit from these NCERT Exemplar Class 11 Biology Solutions Chapter 22 ?

Those students who are appearing for the entrance exam for higher education and those who want to score high in their final exams. 


2. Who has prepared these solutions?

These NCERT Exemplar Class 11 Biology solutions chapter 22 are prepared by our team of experts who have experience in subject matter for years. 

3. Which topics are included in the chapter?

The entire chapter covers the endocrine system of the human body, various hormones, glands, and hormonal action. 

4. How to make use of these solutions?

One can use these Class 11 Biology NCERT Exemplar Solutions Chapter 22 to learn about the topics in detail and also use them to refer to while solving questions before the exam.

5. What are the major endocrine glands and their functions?

The major endocrine glands and their primary functions include the pituitary (growth, metabolism, reproduction), thyroid (metabolism), parathyroid (calcium regulation), adrenal (stress response, blood pressure), pancreas (blood sugar), ovaries (female reproduction), and testes (male reproduction).

6. What is the role of thyroid hormones in metabolism?

Thyroid hormones, primarily T3 and T4, are crucial for regulating metabolism by influencing the basal metabolic rate (BMR), which is the amount of energy your body uses at rest, and affecting the metabolism of carbohydrates, proteins, and fats.

7. How does insulin regulate blood sugar levels?

Insulin regulates blood sugar by facilitating glucose uptake into cells, promoting glucose storage as glycogen, and suppressing glucose production by the liver, thus lowering blood glucose levels.

8. What are the effects of growth hormone deficiency?

Growth hormone deficiency (GHD) can lead to stunted growth in children, and delayed puberty, and in adults, it can cause reduced muscle mass, increased body fat, fatigue, and other metabolic and cardiovascular issues.

9. How do adrenal glands help in stress response?

During a stress response, adrenal glands, located atop the kidneys, release hormones like adrenaline (epinephrine) and cortisol, preparing the body for a "fight-or-flight" reaction by increasing heart rate, blood pressure, and energy levels. 

10. What is the difference between endocrine and exocrine glands?

Exocrine glands secrete their substances through ducts onto your body's surfaces. On the other hand, endocrine glands secrete their substances directly into your bloodstream. They're called ductless glands.

11. How do feedback mechanisms control hormone secretion?

Feedback mechanisms, primarily negative feedback, control hormone secretion by regulating hormone levels in the blood, ensuring they stay within a narrow range, while positive feedback amplifies the effect.

12. How do hormones regulate body functions in humans?

Hormones, chemical messengers released by the endocrine system, regulate body functions by traveling through the bloodstream and binding to specific receptors on target cells, triggering a cascade of responses that affect cellular activity and ultimately influence various physiological processes.

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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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