Alkynes

IMPORTANT

Alkynes: Overview

This topic covers concepts such as Alkynes, Nomenclature of Alkynes, Isomerism in Alkynes, Chain Isomerism in Alkynes, Position Isomerism in Alkynes, Structure of Alkynes, Hybridisation in Alkynes, Bond Order of Carbon-carbon Bond in Alkynes, etc.

Important Questions on Alkynes

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C1 - C2 bond is shortest in:

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The product(s) obtained via hydration (HgSO4+H2SO4) of 1-butyne would be:

HARD
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The number of possible structural and configurational isomers of a bromo compound, formed by the addition of 1 mole of HBr to 2-pentyne respectively, are –

MEDIUM
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The reagent(s) for the following conversion,

Br-CH2-CH2-Br ? CHCH

is/are

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Give the IUPAC name of the first member of alkyne series.

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Why do but-1-yne and but-2-yne exhibit position isomers.

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Give the position isomers of pentyne.

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There are two possible structures for butyne (positional isomers) — but-1-yne and but-2-yne.

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Compare the solubility of alkynes with respect to that of alkanes and alkenes.

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Alkynes are _____ in water.

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All alkynes are colourless except _____.(acetylene/ethylene)

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Which of the following alkyne has characteristic odour?

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In presence of CuCl/NH4Cl, the ethyne is first converted into vinyl acetylene which is the starting material of neoprene.

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Thin films of polyacetylene can be used as electrodes in batteries.

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The alkyne used in the preparation of chloroprene is _____.

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The catalyst used in the polymerization of Alkynes is _____.

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Write a note on linear polymerization of alkyne.

HARD
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What would be the expected product of the reaction of propyne with Br2/H2O if the mechanism of this reaction is analogous to that of propene?(Bromoacetone/Bromopropanol)

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The following conversion can be carried out by
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