Question

Where is the pressure less than 1 atm?

• A. At a place where water boils at $110{}^{o}C$
• B. At a place where water boils at $90{}^{o}C$
• C. At a place below sea level
• D. At a place where water boils at $100{}^{o}C$

Answer 1

The correct option is B At a place where water boils at $90{}^{o}C$

We know water boils at 373K of atmospheric pressure is 1 atm

Now,

$PV=nRT$

$P\propto T$

If the pressure is higher than 1 atm,then water will boil at temperature more than 373K.

If pressure is less than 1 atm,then water will boil at temperature less than 373K.