1. [A] (ii) and (iii) The process of respiration in the human body and decomposition of vegetable matter involves evolution of energy.

    [A] (ii) and (iii)
    The process of respiration in the human body and decomposition of vegetable matter involves evolution of energy.

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  2. [C] ionic compounds are insoluble in water Ionic compounds are generally soluble in water (polar solvent) and insoluble in solvents such as kerosene, petrol, etc., (non polar solvents).

    [C] ionic compounds are insoluble in water
    Ionic compounds are generally soluble in water (polar solvent) and insoluble in solvents such as kerosene, petrol, etc., (non polar solvents).

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