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

  • question_answer
    DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Decay and decomposition of dead organic matter (leaves and dead animal bodies) by microbes is a chemical reaction. Reason (R): In a chemical change original substance and its properties are changed to new material with new properties.

    A) Both A and R are true and R is the correct explanation of A.

    B) Both A and R are true but R is not the correct explanation of A.

    C) A is true but R is false.

    D) A is false but R is true.

    Correct Answer: A

    Solution :

    Both A and R are true and R is the correct explanation of A.


You need to login to perform this action.
You will be redirected in 3 sec spinner