CH 3 - C ≡ CMgBr can be prepared by the reaction of

CH 3 - C ≡ C - Br with MgBr 2

CH 3 - C ≡ CH with KBr and Mg metal

Predict the correct intermediate and product in the following reaction H 3 C - C ≡ CH → HgSO 4 H 2 O , H 2 SO 4 intermediate → product ( A ) ( B )

A : H 3 C - C | OH = CH 2 B : H 3 C - C | | O - CH 3

A : H 3 C - C | SO 4 = CH 2 B : H 3 C - C | | O - CH 3

A : H 3 C - C | OH = CH 2 B : H 3 C - C | SO 4 = CH 2

A : H 3 C - C | | O - CH 3 B : H 3 C - C ≡ CH

In the reaction x and y , respectively, are

x = C H 3 I ; y = N a in liq. N H 3

x = C H 3 O H ; y = P d B a S O 4 , quinoline, H 2

x = C H 3 I ; y = P d B a S O 4 , quinoline, H 2

x = C H 3 O H ; y = N a in liq. N H 3

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The carbide which reacts with water to form ethyne is

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Important Questions on Hydrocarbons

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Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

Which among the following depicts the correct order of acidity?

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Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

The pair of electron in the given carbanion,

C H_{3} C \equiv C^{⊖}

is present in which of the following orbitals?

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

The major product of the following reaction is

Question Image

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Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

What is the final major product of the following reaction?

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MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

The major organic compound formed by the reaction of 1, 1, 1 - trichloroethane with silver powder is :

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

For the given reaction:

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What is $A$ ?

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

{CH}_{3} - C \equiv CMgBr

can be prepared by the reaction of

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

Predict the correct intermediate and product in the following reaction

\begin{matrix} H_{3} C - C \equiv CH & \overset{H_{2} O, H_{2} {SO}_{4}}{\underset{{HgSO}_{4}}{\to}} & intermediate & \to & product \\ (A) & (B) \end{matrix}

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

A compound

X

formed after heating coke with lime reacts with water to give

Y

which on passing over red - hot iron at

873 K

produces

Z

. The compound

Z

is:

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

In the following reaction sequence

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X and Y are, respectively

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Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

Which gas is obtained by the reaction of calcium carbide with water?

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

What is the special feature of the structure of ethyne?

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

Which gas is produced in reaction of calcium carbide with water?

HARD

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

The reaction(s) leading to the formation of 1, 3, 5-trimethylbenzene is (are)

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Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

In the reaction

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$x$ and $y$ , respectively, are

HARD

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

Consider the following reactions:
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‘A’ is:

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Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

The major product of the following reaction is

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Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

2, 3-dibromobutane can be converted to 2-butyne in two-step reaction using

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

{Al}_{4} C_{3}

{Mg}_{2} C_{3}

and

{CaC}_{2}

are separately treated with water. The organic products formed respectively, are -

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Methods of Preparation of Alkynes

Phenylacetylene on treatment with

{HgSO}_{4} {/H}_{2} {SO}_{4}, H_{2} O

produces

The carbide which reacts with water to form ethyne is

Important Questions on Hydrocarbons

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