Question

On a day during the Monsoon season, the relative humidity at a place is $90$% and the temperature is ${15}^o\left(C\right)$ The saturation vapour pressure of water at this temperature is $0.016\times {10}^{5}Pa$. The partial pressure of water vapour in the air on that day is

• A. $0.9\times {10}^{5}Pa$
• B. $0.0169\times {10}^{5}Pa$
• C. $0.0152\times {10}^{5}Pa$
• D. $1.0\times {10}^{5}Pa$

Answer 1

The correct option is C $0.0152\times {10}^{5}Pa$

$R.H.=\frac{\text{partial pressure}}{\text{saturated vapour pressure}}$
$\frac{90}{100}=\frac{\text{partial pressure}}{0.0169\times {10}^5}$
partial pressure $=0.0152\times {10}^{5}Pa$