Multiple choice

Consider the following substances:

  1. Melting point of a substance increases on adding impurity.
  2. If the temperature of the surrounding is increased, the clock will lose the time.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is incorrect. Melting point of a substance decreases on adding impurity. Melting points are associated with packaging of molecules of substance. With the addition of impurities between the molecules, it decreases the melting point. Statement 2 is correct. When the temperature increases, the metallic pendulum expands. So, it takes more time to complete one oscillation. So, the clock loses time (goes slow).

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