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Critical temperature for CO2 and CH4 are...

Critical temperature for `CO_2` and `CH_4` are `30.98^@C` and `-81.9^@C` respectively. Which of these has stronger intermolecular forces. Why?

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Higher the critical temperature, more easily the gas can be liquified and hence greater will be the intermolecular forces of attraction. Hence `CO_2` has stronger intermolecular forces than `CH_4`.
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