Judge each alcohol claim and reason

Exercise and reference answers

Questions

1. Reason

   The phenoxide ion spreads its negative charge into the aromatic ring by resonance.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Phenol is a stronger acid than ethanol.

2. Reason

   Methoxymethane carries the larger molecular mass of the two.

   Verdict

   The assertion is true and the reason is false.

   Assertion

   Ethanol boils roughly 100 K above methoxymethane of the same molecular mass.

3. Reason

   Dehydration runs through a carbocation, and the tertiary carbocation is the most stable.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   A tertiary alcohol dehydrates faster than a primary one in concentrated sulphuric acid.

4. Reason

   A primary alcohol is oxidised first to an aldehyde.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Oxidation of propan-1-ol with hot acidic dichromate stops at the aldehyde.

Instructions

Read the claim and the reason under it, then tap the verdict that fits how alcohols behave.

Explanation