How many moles of a diol are required to produce one moleof hydrogen gas?
Correct answer: A. 1
- A. 1
- B. 2
- C. 3
- D. 4
Explanation
A diol is an alcohol with two hydroxyl (-OH) groups. When reacted with an excess of an active metal like sodium, both acidic protons will be displaced to form H₂ gas. The stoichiometry is R(OH)₂ + 2Na → R(ONa)₂ + H₂, meaning one mole of the diol produces one mole of H₂ gas.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary alcohols.
Practise Alcohols and Phenols
535 free Alcohols and Phenols MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Alcohols and Phenols questions
Alcohols react with Na metal to produce:
An organic compound X is prepared by the oxidation of ethanol. This X reacts with ethanol to produce an ester, what is X likely to be:
Isobutyl alcohol and isopentyl alcohol are:
A raspberry-flavored compound is produced by a condensation process. The process may be:
A functional group isomer of an alkoxyalkane reacts with analkanoic acid to produce an:
An excess of alcohol at a low temperature in the presenceof conc. H₂SO₄ produces an: