Arrange benzene, n-hexane and ethyne in decreasing order of acid

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 Multiple Choice QuestionsShort Answer Type

191.

How will you convert:
(i) Propyne into acetone
(ii) Ethyne into propyne?

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 Multiple Choice QuestionsLong Answer Type

192.

Discuss in brief the oxidation reactions of alkynes.

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193.

Write briefly the polymerisation reactions of alkynes.

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194.

How will you convert ethanoic acid into benzene ?

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 Multiple Choice QuestionsShort Answer Type

195.

Discuss the acidic character of alkynes. 

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 Multiple Choice QuestionsLong Answer Type

196. Write three reactions to show the acidity of alkynes.
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197.

Alkynes are acidic in nature, whereas alkenes and alkanes are not. Explain.

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 Multiple Choice QuestionsShort Answer Type

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198.

Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give reason for his behaviour. 


The decreasing order of acidic strength:
Hydrocarbon:                 :   Ethyne>  Benzene >  n-Hexane
Hybridization of C-atoms :   (sp)          (sp2)          (sp3)

The acidic character is linked with the percentage of s-character. Greater the s-character, more is the electronegativity of the carbon atom and more will be the acidic character.

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199.

Give simple chemical test for the distinction of:
(i) Propyne and propane

(ii) But-1-yne and But-2-yne.

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200.

How will you separate acetylene from a mixture of acetylene and ethylene?

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