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Answer true or false.
(a) The reduction of an aldehyde always gives a primary alcohol.
(b) The reduction of a ketone always gives a secondary alcohol.
(c) The oxidation of an aldehyde gives a carboxylic acid.
(d) The oxidation of a primary alcohol gives a ketone.
(e) Tollens’ reagent can be used to distinguish between an aldehyde and a ketone.
(f) Sodium borohydride, NaBH4, reduces an aldehyde to a primary alcohol.
(g) The addition of one molecule of alcohol to the carbonyl group of a ketone gives a hemiacetal.
(h) The reaction of an aldehyde with two molecules of alcohol gives an acetal, plus a molecule of water.
(i) The formation of hemiacetals and acetals is reversible.
(j) The cyclic hemiacetal formed from 4-hydroxypentanal has two stereocenters and can exist as a mixture of 22 = 4 stereoisomers.
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