Chemistry Practical Class 12

The Central Board of Secondary Education is a prestigious educational board in India that conducts the final exams for the 10th and 12th standard. The syllabus for practical exam is created by CBSE according to the CCE guidelines.

Chemistry is a very interesting subject. Students of class 12 must concentrate on Chemistry Practical Class 12 because it consists of 30 marks. Students must aim to get full marks in this section to increase their overall marks and excel in CBSE class 12 examination.

Students should study the laws and theories before performing the experiments. Students are suggested to revise their practical notes before their examination. Chemistry Practical Class 12 experiments are given here so that students can prepare for their examination efficiently.

A – Surface chemistry

(a). Preparation of one lyophilic and one lyophobic sol

Lyophilic sol – starch

Lyophilic sol – gum

Lyophilic sol – egg albumin

Lyophobic sol- aluminium hydroxide

Lyophobic sol- ferric hydroxide

Lyophobic sol- arsenous sulphide

(b). Dialysis of sol-prepared in above

(c). Study of the role of emulsifying agents in stabilizing the emulsion of different oils

B – Chemical Kinetics

(a). Effect of concentration on the rate of reaction between Sodium Thiosulphate & Hydrochloric acid

(b). Effect of temperature on the rate of reaction between Sodium Thiosulphate & Hydrochloric acid

(c). Study of reaction rates of any one of the following:

(i). Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentration of Iodide ions

(ii). Reaction between Potassium lodate, (KIO3,) & Sodium Sulphite: (Na2SO3,) using starch solution as indicator (clock reaction)

C – Thermochemistry

Any one of the following experiments

(i). Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate

(ii). Enthalpy of neutralization of strong acid (HCl) and strong base (NaOH)

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

D – Electrochemistry

Variation of cell potential in Zn/Zn2+ || Cu2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature

E – Chromatography

(i). Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values

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

F – Preparation of Inorganic Compounds

(i). Preparation of double salt of Ferrous Ammonium Sulphate

(ii) Preparation of double salt or Potash Alum

(iii). Preparation of Potassium Ferric Oxalate

G – Preparation of Organic Compounds

Preparation of any one of the following compounds

(i). Acetanilide

(ii). Di -benzal Acetone

(iii). p-Nitroacetanilide

(iv). 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 food stuffs

J – Determination of concentration? Molarity of KMnO4 solution by titrating it against a standard solution of:

(i). Oxalic acid

(ii). Ferrous Ammonium Sulphate

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

K – Qualitative analysis

Determination of one cation and one anion in a given salt.

Cation:- Pb2+, Cu2+ As3+, Al3+, Fe3+, Mn2+ , Zn2+, Cu2+, Co2+, Ni2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4+

Anions:- CO3 2‒, S2‒, SO32‒, SO42‒, NO2‒, NO3‒, Cl‒, Br‒, I‒, PO43‒, C2O42‒, CH3COO‒

(Note: Insoluble salts excluded)

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Practise This Question

Among the following, the coloured compound is 
                                                        (IIT-JEE, 2008)