Assertion (A) : `CH_(3)OCH_(3) and C_(2)H_(5)OH` has comparable molecular weight but boiling point of `C_(2)H_(5)OH` is more than dimethyl ether.
Reason (R) : `C_(2)H_(5)OH` forms intermolecular. H-bonding while `CH_(3)OCH_(3)` forms intramolecular H-bonding.

Options

A. If both A and R are true and R is the correct explanation of A.
B. If both A and R are true but R is not the correct explanation of A.
C. If A is true but R is false
D. If A is false but R is true.

Answer

C

Explanation

Due to the presence of hydroxyl group `(-OH),` there is extensive hydrogen, bonding between the ethanol molecules `(C_(2)H_(5)OH)` . But there is no such Hydrogen bonding in Dimethyl ether (due to absence of -OH group.) So boiling point of Dimethyl ether is much lower than ethanol.