CBSE Class 12 Chemistry Practical Syllabus

CBSE Class 12 Syllabus for Chemistry Practical exam is available here. Students will find complete details related to practical exam including evaluation scheme, list of experiments, projects work etc.You will find all the important things and prepare well for CBSE Class 12 chemistry practical exam.

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  1. Preparation of one lyophilic and one lyophobic sol.
    1. Lyophilic sol: starch , egg albumin and gum.
    2. Lyophobic sol: aluminium hydroxide, ferric hydroxide, arsenious sulphide.
  2. Dialysis of sol prepared in (1) above.
  3. Study of the role of emulsifying agent in stabilizing the emulsions of different oils.
  1. Effect of concentration and temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid.
  2. Study of reaction rates of any one of the following:
    1. Reaction of iodide ion with hydrogen peroxide at room temperature using different concentrations of iodide ions.
    2. Reaction between potassium iodate (KIO3 ) and sodium sulphite (Na2 SO3) using starch solution as indicator (clock reaction).
Any one of the following experiments:

  1. Enthalpy of dissolution of copper sulphate or potassium nitrate.
  2. Enthalpy of neutralization of strong acid (HCl) and strong base (NaOH)
  3. Determination of enthalpy change during interaction (Hydrogen bond formation) between acetone and chloroform.
  • Variation of cell potential in Zn|Zn2+||Cu2+|Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.
  1. Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values.
  2. Separation of constituents present in an inorganic mixture containing two cations only (constituents having wide difference in Rf values to be provided).
  1. Preparation of double salt of ferrous ammonium sulphate or potash alum.
  2. Preparation of potassium ferric oxalate.
Preparation of any one of the following compounds:

  1. Acetanilide
  2. Di-benzal acetone
  3. p-Nitroacetanilide
  4. Aniline yellow or 2 – Napththol aniline dye
  • Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (primary) groups.
  • Tests of Carbohydrates Fats and Proteins in Pure Samples and Their Detection in Given Food Stuffs.
Determination of one cation and one anion in a given salt.Cations: \(Pb^{2+}, Cu^{2+}, As^{3+}, Al^{3+}, Fe^{3+}, Mn^{2+}, Ni^{2+}, Zn^{2+}, Co^{2+}, Ca^{2+}, Sr^{2+}, Ba^{2+}, Mg^{2+}, NH^{+}_{4}\)

Anions: \(CO^{2-}_{3}, S^{2-}, SO^{2-}_{3}, NO^{-}_{2}, NO^{-}_{3}, Cl^{-}, I^{-}, PO^{3-}_{4}, C_{2}O^{2-}_{4}, CH_{3}COO^{-}\)

(Note : Insoluble salts excluded)

Scientific investigations involving laboratory testing and collecting information from other sources.A few suggested projects

  1. Study of presence of oxalate ions in guava fruit at different stages of ripening.
  2. Study of quantity of casein present in different samples of milk.
  3. Preparation of soybean milk and its comparison with the natural milk with respect to curd formation, effect of temperature, etc.
  4. Study of the effect of potassium bisulphate as food preservative under various conditions (temperature, concentration, time etc.)
  5. Study of digestion of starch by salivary amylase and effect of pH and temperature on it.
  6. Comparative study of the rate of fermentation of following materials: wheat flour, gram flour, potato juice, carrot juice etc.
  7. Extraction of essential oils present in Saunf (aniseed), Ajwain (carum), Illaichi (cardamom).
  8. Study of common food adulterants in fat, oil, butter, sugar, turmeric powder, chilli powder and pepper.

Practise This Question

Suppose you are a very competent surgeon in a super-famous hospital, which is located in Chennai. The year is 2004, 16 years after you joined as the chief of Surgery. The whole city is struck by a major tsunami and the non-stop rains have flooded your hospital. There is no electricity and you are in surgery with only 30 minutes of power backup, barely enough to sustain vital medical equipment and the lights. Your knowledge and experience suggest that you will be able to finish the surgery in not more than 18 minutes but the blood plasma has just precipitated. You cannot connect any more equipment but you will need to convert the precipitated blood into a colloid again or else the patient is no more. What do you do?