Question

Which of the following is not a disadvantage of mercury barometer?

• A. Mercury does not stick to glass.
• B. It has a long glass tube and cannot be easily carried from one place to another.
• C. It requires zero adjustment before taking the reading.
• D. The barometer tube needs to be kept vertical to get the correct reading.

Answer 1

The correct option is A Mercury does not stick to glass.

Mercury barometer has the following disadvantages:

1. It has a long glass tube with no protection to it. So, it cannot be easily carried from one place to another.

2. It requires zero adjustment before taking the reading.

3. The barometer must be kept vertical to get the correct reading.

4. The container in which the glass tube is inverted is open from the top. So, the impurities may fall into it making the mercury impure.