Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) Cyclic hemiacetals are usually more stable than noncyclic hemiacetals.
(2) A carbonyl group consists of a carbon atom and an oxygen atom joined by a double bond.
(3) The compound benzaldehyde contain six carbon atoms.

Question

Quizplus · Accepted Answer

(1) FALSE - Noncyclic hemiacetals are more stable due to the fact that the cyclic form of a hemiacetal can easily open up to form the more stable noncyclic form. 
(2) TRUE - A carbonyl group is defined as a carbon atom bonded to an oxygen atom by a double bond.
(3) TRUE - The compound benzaldehyde has a benzene ring attached to a formyl group, which contains one carbon atom bonded to an oxygen atom. The benzene ring also contains six carbon atoms.

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