SCHOOL NAME, PLACE, DISTRICT, STATE
ALL INDIA SENIOR SCHOOL CERTIFICATE EXAMINATION (AISSCE)-2023
CHEMISTRY PRACTICAL EXAMINATION PAPER
Class:- 12 Subject:-Chemistry
Time : 3 hours M.M. : 30
Instructions :-
- Question number 1,2 and 3 to be performed in the lab.
- All question are compulsory.
- Perform the given experiment and report that in examination note book systematically.
Take all the precautions while working in the lab and protect your note book from chemicals burn etc.
Q1. Prepare a standard solution of M/20 ferrous ammonium sulphate ( Mohr’s salt ) in 250 ml. Using this solution, determine the molarity and strength of the given potassium permanganate (KMnO4) solution.
(OR)
Prepare a standard solution of M/40 oxalic acid in 250ml. Using this solution; determine the molarity and strength of the given potassium permanganate (KMnO4) solution. (8)
Q2. Detect the presence of one cation and one anion in given salt. (8)
Q3. Identify the functional group present in the given organic compound. (6)
(From Organic Chemistry)
Or Prepare the colloidal solution of starch / gum egg albumin / Ferric hydroxide / Aluminium hydroxide / Arsenic sulphide.
( From Surface Chemistry )
Or Study the effect of concentration / temperature on the rate of reaction between Sodium thiosulphate and Hydrochloric acid. Report the result after analyze the observations.
( From Chemical Kinetics )
Or (a) Find out the Enthalpy of dissolution of Copper Sulphate / Potassium Nitrate.
/ Find out the Enthalpy of neutralization of strong acid (HCI) and strong base (NaOH).
/ Determination of enthaply change during interaction (Hydrogen bond formation) between Acetone and Chloroform.
(From Thermodynamics )
Or Study the variation of cell potential in Zn/Zn2+|| Cu2+/Cu cell with change in concentration of electrolytes (CuSO4 /ZnSO4) at room temperature. Report the result after analyzing the observations.
( From Electro chemistry )
Or Separate the pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values.
/ Separate the constituents present in an inorganic mixture containing cobalt and nickel ions.
(From separation of mixture )
Or prepare the double salt of Ferrous Ammonium Sulphate or Potash Alum or prepare Potassium Ferric Oxalate.
( Preparation of inorganic compounds )
Or prepare the Acetanilide / Di -benzalAcetone / p-Nitroacetanilide / Aniline yellow / 2 – Naphthol / Aniline dye.
( Preparation of organic compounds )
Q4. Investigatory Project (4)
Q5. Class record and viva-voice (4)
Sign of Internal Examiner Sign of External Examiner
Internal Examiner Number/ Oasis Id External Examiner Number/ Oasis Id
CHEMIGOD 