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ExamsJEE MainChemistry

For the compounds: (A) H3C-CH2-O-CH2-CH2-CH3 (B) H3C-CH2-CH2-CH2-CH3 (C) CH3-CH2-C(=O)-CH2-CH3 (D) H3C-CH(OH)-CH2-CH2-CH3 The increasing order of boiling point is : Choose the correct answer from the options given below :

  1. (A) < (B) < (C) < (D)
  2. (B) < (A) < (C) < (D)
  3. (D) < (C) < (A) < (B)
  4. (B) < (A) < (D) < (C)

Correct answer: (B) < (A) < (C) < (D)

Solution

The boiling points of these compounds increase with the presence of functional groups and molecular weight. Compound (B) is a simple alkane with the lowest boiling point, while (D) has an alcohol group that significantly raises its boiling point due to hydrogen bonding, followed by (C) with a carbonyl group, and (A) with an ether linkage, which has a moderate boiling point.

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