Atmospheric pressure can be measured in terms of pascal, millibar and torr. Which is the correct relation between one torr and one millibar.

Options

A. 1 torr=5.5 millibar
B. 1 torr=1.333 millibar
C. 1 torr=7.238 millibar
D. 1 torr=50 millibar

Answer

C

Explanation

1 torr=pressure exerted by a mercury column of height 1mm
`=hrhog=10^(-3)xx13.6xx1000xx9.8=133.3N//m^2`
and 1 bar`=10^5N//m^2`
1 millibar`=10^2N//m^2`
`:.` 1 torr`=133.3N//m^2=(133.3)/(10^2)=133.3` millibar