7th Class Science Acids, Bases and Salts Question Bank Acids, Bases and Salts

  • question_answer 63) DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled 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): Sodium hydroxide is an alkali. Reason (R): All bases are alkalies.

    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: C

    Solution :

    All alkalies are bases but all bases are not alkalies. Only water soluble bases are alkalies.

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