Question

A trekker climbs up a mountain with a barometer. As he goes up, the mercury column ____.

• A. goes up
• B. goes down
• C. remains as it is
• D. goes down to zero

Answer 1

The correct option is B

goes down

With increase in altitude, the pressure decreases. The height of mercury column in a barometer indicates the pressure. So, with increase in altitude the mercury column should go down. But the column would not go down to zero because none of the cliffs on the earth is so high to have zero pressure.