Assertion: CH 2 OCH 3 and C 2 H 5 OH has comparable molecular weight but boiling point of C2H5OH 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

Question

Assertion: CH 2 OCH 3 and C 2 H 5 OH has comparable molecular weight but boiling point of C2H5OH 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 (A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion (B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion (C) If Assertion is true but Reason is false (D) If Assertion is false but Reason is true

Tardigrade Admin · Accepted Answer

Due to the presence of hydroxyl group (-OH), there is extensive hydrogen bonding between the ethanol molecules (C2H5 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.

Q. Assertion : $C H_{2} OC H_{3}$ and $C_{2} H_{5} O H$ has comparable molecular weight but boiling point of C₂H₅OH is more than dimethyl ether.
Reason (R): $C_{2} H_{5} O H$ forms intermolecular H-bonding while $C H_{3} OC H_{3}$ forms intramolecular H-bonding

If both Assertion and Reason are true and Reason is the correct explanation of Assertion

If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

If Assertion is true but Reason is false

If Assertion is false but Reason is true

Due to the presence of hydroxyl group (- $O H$ ), there is extensive hydrogen bonding between the ethanol molecules $(C_{2} H_{5} O H)$ . But there is no such hydrogen bonding in dimethyl ether (due to absence of - $O H$ group). So boiling point of dimethyl ether is much lower than ethanol.

Q. Assertion : CH2​OCH3​ and C2​H5​OH has comparable molecular weight but boiling point of C2H5OH is more than dimethyl ether. Reason (R): C2​H5​OH forms intermolecular H-bonding while CH3​OCH3​ forms intramolecular H-bonding