Question

At sea level, the vertical height of mercury supported in the tube of simple barometer is ______ $cm$ above the mercury level in the bowl.

• A. $36$
• B. $76$
• C. $100$
• D. $7$

Answer 1

The correct option is B $76$

The height to which mercury rises in simple barometer is $76cm$.

This is the reason that atmospheric pressure is often expressed as $76cm$ of Hg at sea level.