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7th Class Science Physical and Chemical Changes Question Bank Physical and Chemical Changes

  • question_answer
    DIRECTIONS: Read the following three statements and choose the correct answer. (i) A few drops of petrol poured on to your palm will feel cool, because it involves evolution of heat. (ii) Burning of a petrol is an exothermic reaction. (iii) Neutralization reaction is an endothermic change.

    A) Statement (i) and (iii) are incorrect but (ii) is correct

    B) Statement (i) and (ii) are incorrect but (iii) is correct

    C) All statements are correct

    D) All statements are incorrect

    Correct Answer: A

    Solution :

    Neutralization reaction is an exothermic change when we pour a few drops of petrol on to our palm we feel cool because it absorbs our body heat (Endothermic change)


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