CBSE Class 12 Chemistry Practical 2026: Project Ideas, Viva Questions & Evaluation Scheme

CBSE Class 12 Chemistry Practical Project Ideas

Scientific investigations involve laboratory testing and collecting information from other sources. Check out a few suggested CBSE Board Class 12th Chemistry project ideas below.

• Study of the presence of oxalate ions in guava fruit at different stages of ripening.

• Study of the quantity of casein present in different samples of milk.

• Preparation of soybean milk and its comparison with natural milk with respect to curd formation, effect of temperature, etc.

• Study of the effect of Potassium Bisulphate as a food preservative under various conditions (temperature, concentration, time, etc.)

• Study of the digestion of starch by salivary amylase and the effect of pH and temperature on it.

• Comparative study of the rate of fermentation of the following materials: wheat flour, gram flour, potato juice, carrot juice, etc.

• Extraction of essential oils present in Saunf (aniseed), Ajwain (carom), and Illaichi (cardamom).

• Study of common food adulterants in fat, oil, butter, sugar, turmeric powder, chilli powder and pepper.

CBSE 12th Chemistry 2026 Practical Evaluation Scheme

Students can check out the table below to learn more about the evaluation scheme for the CBSE Class 12 Chemistry practical exam.

CBSE Class 12 Chemistry Practical Viva Sample Questions

Students are required to attend the viva-voce for the CBSE 12th Chemistry practical exam. External examiners ask the viva questions to students after the practical examination. Check out some of the practical viva sample questions for the CBSE Class 12 Chemistry subject.

Q1) What is titration?

Ans. The process of adding one solution from a burette to another in a conical flask to complete a chemical reaction is known as titration.

Q2) What is the basicity of H₂SO₄?

Ans. The basicity of H₂SO₄ is 2.

Q3) What are acidimetry and alkalimetry?

Ans. The methods of volumetric analysis involve the chemical reaction between an acid and a base to determine their concentrations are known as acidimetry and alkalimetry.

Q4) Is sodium hydroxide a primary standard?

Ans. No, sodium hydroxide is not a primary standard. It is a secondary standard.

Q5) What will be the normality of 0.10M KMnO₄?

Ans. The normality of KMnO₄ will be 0.1 x 5 = 0.5 N.

CBSE Class 12 Chemistry 2026 Practical Syllabus

Students can check out the CBSE 12th Chemistry syllabus for the practical examination. Micro-chemical methods are available for several of the practical experiments; wherever possible, such techniques should be used.

A. Surface Chemistry

• Preparation of one lyophilic and one lyophobic sol

  • Lyophilic sol - starch, egg albumin and gum

  • Lyophobic sol – aluminium hydroxide, ferric hydroxide, arsenous sulphide.

• Dialysis of sol-prepared in (a) above.

• Study of the role of emulsifying agents in stabilising the emulsion of different oils.

B. Chemical Kinetics

Effect of concentration and temperature on the rate of reaction between Sodium Thiosulphate and Hydrochloric acid. Study of reaction rates of any one of the following:

• Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentrations of Iodide ions.

• Reaction between Potassium Iodate (KIO3) and Sodium Sulphate: (Na2SO3) using starch solution as an indicator (clock reaction).

C. Thermochemistry

Any one of the following experiments

• Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate.

• Enthalpy of neutralisation of strong acid (HCL) and strong base (NaOH).

• Determination of the enthalpy change during interaction (Hydrogen bond formation) between Acetone and Chloroform.

D. Electrochemistry

E. Chromatography

• Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values.

• Separation of constituents present in an inorganic mixture containing two cations only (constituents having a large difference in Rf values to be provided).

F. Preparation of Inorganic Compounds

• Preparation of double salt of Ferrous Ammonium Sulphate or Potash Alum.

• Preparation of Potassium Ferric Oxalate.

G. Preparation of Organic Compounds

Preparation of any one of the following compounds

• Acetanilide

• Di -benzalAcetone

• p-Nitroacetanilide

• Aniline yellow or 2-Naphthol Aniline dye.

H. Tests for the functional groups present in organic compounds

Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (Primary) groups.

I. Characteristic tests of carbohydrates, fats and proteins in pure samples and their detection in given foodstuffs.

J. Determination of concentration/ molarity of KMnO4 solution by titrating it against a standard solution of:

• Oxalic acid,

• Ferrous Ammonium Sulphate

(Students will be required to prepare standard solutions by weighing themselves).

K. Qualitative Analysis