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Question

The boiling point of a liquid X is 1200 c more than that of water. Boiling point of x is

A
353k
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B
373k
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C
393k
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D
120k
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Solution

The correct option is B 393k
Boiling point is the temperature at which vapor pressure equals to atmospheric pressure. In simple words, it is the temperature at which a liquid boil and changes to vapor. Water boils at 1000C. So it's boiling point is 1000c.

The boiling point of liquid X is 200c more than that of water. So, the boiling point of liquid X=100+20=1200c

To convert 0C to kelvin, we add 273.

So, boiling point of liquid X=120+273=393K

Hence, choice (3) is correct.

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