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Q. Which of the following will have the highest boiling point at $1 \,atm$ pressure?

Chhattisgarh PMTChhattisgarh PMT 2005

Solution:

$BaCl _{2}$ Gives maximum ions hence, it shows lowest vapour pressure and highest boiling point
( $\Delta T_{b} \,\alpha\, n ; n$ is the number of ions).