Science Quiz / Alkene and Alkyne True-False

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Can you state whether each of these statements about alkene and aklyne reactions is TRUE or FALSE?

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Addition of excess HCl to an alkyne results in the formation of a geminal dihalide.

Keto-enol tautomerization is synonymous with resonance.
An aldehyde may be synthesized from a terminal alkyne using HgSO4, H2SO4, and water.
Hydration of unsymmetrical internal alkynes using HgSO4, H2SO4, and water will result in the formation of two isomeric ketone products.

To synthesize an acetylide anion, NaOMe may be used for deprotonation.

2-pentyne may be synthesized from acetylene, a base, and 1-bromopropane.

The base NaNH2 is strong enough to deprotonate 2-hexyne.
To synthesize a secondary propargyl alcohol, react an acetylide anion with a aldehyde and then perform an acid work-up.
To synthesize a trans alkene from the corresponding alkyne, use dissolving metal reduction conditions.
In order to synthesize (3R,4S)-3,4-dibromohexane from 3-hexyne, one would reduce the alkyne to an alkene using H2/Lindlar's and then add Br2/CCl4.
In the mechanism of reducing an alkyne to an alkene, one step involves the transfer of a single electron from the sodium metal to the alkyne.

There is no such molecule called cyclohexyne.

Ozonolysis may be used to determine if an alkene were cis or trans.

2-methylpropene is a good reagent to use to probe if a reaction is regiospecific.

Ozonolysis of an internal alkyne will yield carboxylic acids.
C10H16 reacts with 1 equivalent of H2 upon catalytic hydrogenation. Ozonolysis of this molecule results in the formation of two carbonyls.

The molecule cis-cyclohexene should not exist.

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