AIIMS AIIMS Solved Paper-2015

  • question_answer
    Assertion (A) Carbonate and hydroxide ores are concentrated by froth floatation process. Reason (R) In froth floatation process, mineral oil is used due to it preferentially wets the gangue particles. Each of these questions contains two statements. Assertion (A) and Reason (R). Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.

    A) If both Assertion and Reason are true and Reason is correct explanation of Assertion.

    B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

    C) If Assertion is true but Reason is false.

    D) If both Assertion and Reason are false.

    Correct Answer: D

    Solution :

    Instead of corbonate and hydroxide ions, sulphide ores are concentrated by froth-floatation process. In this process, pine oil preferentially wets the ore particles.


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