CBSE Class 12 Chemistry Lab Manual

CBSE Class 12 Chemistry Lab Manual

1. Introduction to Basic Laboratory Equipment
   1. Viva Questions with Answers.
2. Surface Chemistry
   1. Exp-2.1 : To prepare colloidal solution (sol) of starch.
   2. Exp-2.2 : To prepare a colloidal solution of gum.
   3. Exp-2.3 : To prepare colloidal solution (or sol) of egg albumin.
   4. Exp-2.4 : To prepare ferric hydroxide, [Fe(OH)₃] sol.
   5. Exp-2.5 : To prepare aluminium hydroxide, [Al(OH)₃] sol.
   6. Exp-2.6 : To prepare colloidal solution of arsenious sulphide, [As₂ S₃].
   7. Exp-2.7 :To study the dialysis of starch sol containing sodium chloride through a cellophane or parchment paper.
   8. Exp-2.8 : Compare the precipitation values of sodium chloride, barium chloride and aluminium chloride for arsenious sulphide sol.
   9. Exp-2.9 : To study the effectiveness of different common oils (castor oil, cotton seed oil, coconut oil, kerosene oil, mustard oil) in forming emulsions.
   10. Exp-2.10 : To compare the effectiveness of a number of emulsifying agents in forming emulsions.
   11. Surface Chemistry Viva Questions with Answers.
3. Chemical Kinetics
   1. Exp-3.1 : To study the effect of concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid.
   2. Exp-3.2 : To study the effect of change in temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid.
   3. Exp-3.3 : To study the reaction rate of reaction of iodide ions with hydrogen peroxide at different concentrations of iodide ions.
   4. Exp-3.4 : To study the reaction rate of the reaction between potassium iodate (KIO₃) and sodium sulphite (Na₂S0₃) using starch solution as indicator.
   5. Chemical Kinetics Viva Questions with Answers.
4. Thermochemistry
   1. Exp-4.1 : Determine the calorimeter constant (W) of calorimeter (polythene bottle).
   2. Exp-4.2 : Determine the enthalpy of dissolution of given solid copper sulphate (CuS0₄.5H₂0) in water at room temperature.
   3. Exp-4.3 : Determine the enthalpy of neutralisation of hydrochloric acid with sodium hydroxide solution.
   4. Exp-4.4 : Determine the enthalpy change during the interaction (hydrogen bond formation) between acetone and chloroform.
   5. Thermochemistry Viva Questions with Answers.
5. Electrochemistry
   1. Exp-5.1 : To set up simple Daniell cell and determine its emf .
   2. Exp-5.2 : To set up simple Daniell cell using salt bridge and determine its emf .
   3. Exp-5.3 : To study the variation of cell potential in Zn | Zn²⁺ || Cu²⁺ | Cu cell with change in concentration of electrolytes (CuS0₄ and ZnS0₄) at room temperature.
   4. Electrochemistry Viva Questions with Answers.
6. Chromatography
   1. Exp-6.1 : Separate the coloured components present in the mixture of red and blue inks by ascending paper chromatography and find their R_f  values .
   2. Exp-6.2 : Separate the coloured components present in the given grass/flower by ascending paper chromatography and determine their R_f  values .
   3. Exp-6.3 : Separate Co²⁺ and Ni²⁺ ions present in the given mixture by using ascending paper chromatography and determine their R_f values .
   4. Chromatography Viva Questions with Answers.
7. Preparation of Inorganic Compounds
   1. Exp-7.1 : To prepare a pure sample of ferrous ammonium sulphate (Mohr’s salt), [FeSO₄ . (NH₄)₂ SO₄.6HO₂0] .
   2. Exp-7.2 : To prepare a pure sample of potash alum (Fitkari), [K₂SO₄.Al₂ (SO₄)₃. 24H₂0] .
   3. Exp-7.3 : To prepare a pure sample of the complex potassium trioxalatoferrate(III), Kg[Fe(C₂O₄)₃l . 3H₂0 .
   4. Preparation of Inorganic Compounds Viva Questions with Answers.
8. Preparation of Organic Compounds
   1. Exp-8.1 : To prepare a sample of acetanilide from aniline.
   2. Exp-8.2 : To prepare a sample of dibenzalacetone.
   3. Exp-8.3 : To prepare a sample of p-nitroacetanilide from acetanilide .
   4. Exp-8.4 : To prepare 2-naphthol aniline or phenyl-azo-β-naphtholdye .
   5. Preparation of Organic Compounds Viva Questions with Answers.
9. Tests for the Functional Groups Present in Organic Compounds
   1. Exp-9.1 : Identify the functional group present in the given organic compound.
   2. Tests for the Functional Groups Present in Organic Compounds Viva Questions with Answers.
10. Tests of Carbohydrates, Fats and Proteins in Pure Samples and Detection of Their Presence in Given Food Stuffs
    1. Exp-10.1 : To study some simple tests of carbohydrates .
    2. Exp-10.2 : To study some simple tests of oils and fats .
    3. Exp-10.3 : To study some simple tests of proteins .
    4. Exp-10.4 : To detect the presence of carbohydrates, fats and proteins in the following food stuffs : Grapes, potatoes, rice, butter, biscuits, milk, groundnut, boiled egg .
    5. Tests of Carbohydrates, Fats and Proteins in Pure Samples and Detection of Their Presence in Given Food Stuffs Viva Questions with Answers.
11. Volumetric Analysis
    1. Exp-11.1 : Prepare 250 ml of M/10 solution of oxalic acid from crystalline oxalic acid .
    2. Exp-11.2 : Prepare 250 ml of a N/10 solution of oxalic acid from crystalline oxalic acid .
    3. Exp-11.3 : Preparation of 250 ml of M/20  solution of Mohr’s salt .
    4. Exp-11.4 : Preparation of 250 ml of N/20  solution of Mohr’s salt .
    5. Exp-11.5 : Prepare M/20 solution of ferrous ammonium sulphate (Mohr’s salt). Using this solution find out the molarity and strength of the given KMn04 solution.
    6. Exp-11.6 : Prepare a solution of ferrous ammonium sulphate (Mohr’s salt) containing exactly 17.0 g of the salt in one litre. With the help of this solution, determine the molarity and the concentration of KMnO₄ in the given solution.
    7. Exp-11.7 :  Prepare M/20 ferrous ammonium sulphate (Mohr’s salt) solution. Find out the percentage purity of impure KMnO₄ sample 2.0 g of which have been dissolved per litre .
    8. Exp-11.8 : Determine the equivalent mass and number of molecules of water of crystallisation in a sample of Mohr’s salt, FeSO₄(NH₄)₂ SO₄ . nH₂0. Provided KMnO₄.
    9. Exp-11.9 :  Prepare M/50 solution of oxalic acid. With its help, determine 50 the molarity and strength of the given solution of potassium permanganate (KMnO₄).
    10. Exp-11.10 :  Find out the percentage purity of impure sample of oxalic acid. You are supplied M/100 KMnO₄ solution.
    11. Exp-11.11 :  The given solution has been prepared by dissolving 1.6 g of an alkali metal permanganate per litre of solution. Determine volumetrically the atomic mass of the alkali metal. Prepare M/20 Mohr’s salt solution for titration.
    12. Exp-11.12 :  Determine the percentage composition of a mixture of  sodium oxalate   and oxalic acid . Provided M/100 KMnO₄ solution.
    13. Exp-11.13 :  You are provided with a partially oxidised sample of ferrous sulphate (FeSO₄.7H₂0) crystals. Prepare a solution by dissolving 14.0 g of these crystals per litre and determine the percentage oxidation of the given sample. Given M/100 KMnO₄ solution.
    14. Exp-11.14 : Calculate the percentage of Fe²⁺ ions in a sample of ferrous sulphate. Prepare a solution of the given sample having strength exactly equal to 14.0 g/litre. Provided M/100 KMnO₄ .
    15. Exp-11.15 : Prepare N/20 Mohr’s salt solution. Using this solution, determine the normality and strength of the given potassium permanganate solution.
    16. Exp-11.16 :  Prepare N/20 solution of oxalic acid. Using this solution, find out strength and normality of the given potassium permanganate solution .
    17. Exp-11.17 : Determine the percentage purity of the given sample of oxalic acid. Ask for your requirement .
    18. Exp-11.18 : Determine the percentage composition of a mixture of sodium oxalate   and oxalic acid . Provided N/20 KMnO₄ .
    19. Exp-11.19 : Determine the equivalent mass and number of molecules of water of crystallisation in a sample of Mohr’s salt FeSO₄ (NH₄)₂ SO₄.nH₂0. Provided N/20 KMnO₄.
    20. Volumetric Analysis Viva Questions with Answers.
12. Chemistry Qualitative Analysis
    1. Exp-12.1 : To analyse the given salt for acidic and basic radicals .
    2. Exp-12.2 : To analyse the given salt for acidic and basic radicals CO, Zn.
    3. Qualitative Analysis Viva Questions with Answers.