New Enroll in our GIC Finance Online Course Here!

    Register

    Question

    Consider the following statements: Assertion (A):

    Alcohol, instead of mercury, is used in thermometers to measure temperatures up to 60°C. Reason (R): The freezing point temperature of alcohol is lower than mercury.
    A Both (A) and (R) are true, but (R) is not the correct explanation for (A). Correct Answer Incorrect Answer
    B Both (A) and (R) are true and (R) correctly explains (A). Correct Answer Incorrect Answer
    C (A) is true, but (R) is false. Correct Answer Incorrect Answer
    D (A) is false, but (R) is true. Correct Answer Incorrect Answer

    Solution

    Mercury freezes at -39°C, whereas alcohol freezes at temperatures well below -100°C. This makes alcohol suitable for measuring very low temperatures. On the other hand, mercury boils at 357°C, while alcohol boils at 78°C, making mercury more appropriate for measuring high temperatures. Thus, both (A) and (R) are true and (R) correctly explains (A). Hence, the correct answer is (B).

    Practice Next

    Relevant for Exams: