Question

Mercury is the heaviest liquid.
What is the advantage of the given property in the working of a barometer?

• A. It gives stability to the apparatus.
• B. Its rises to a maximum height of 76 cm which is the smallest value for a fluid.
• C. Other impurities float over it.
• D. It is poisonous.

Answer 1

The correct option is B Its rises to a maximum height of 76 cm which is the smallest value for a fluid.

Since the density of mercury is highest in the liquids, it needs smallest column to measure the pressure reducing the size of the equipment and making it easier to use.