1.

Although hexafluoroethane (C_2F_6,b.p.-79^@C) and ethane (C_2H_6 b.p. – 89^@C) differ very much in their molecular weights, their boiling points differ only by 10^@C. This is due to

Answer»

low polarizability of F
nearly similar SIZE of F and H
both (a) and (b)
Neither of the two

Solution : Small difference in boiling points of `C_2F_6` and `C_2H_6` is DUE to the fact that (i) the F atom is only SLIGHTLY LARGER than H, and (ii) F has low polarizability .


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