State one relevant reason for the following: Soda-lime is preferred to sodium hydroxide in the laboratory preparation of methane.

In a laboratory, methane is prepared by heating the mixture of sodium acetate and soda-lime. Soda-lime is a mixture of sodium hydroxide and calcium oxide. Since, alone sodium hydroxide is a deliquescent substance that absorbs moisture from the atmosphere and becomes liquid and will affect the production of methane instead soda-lime absorbs less water and makes the production effective.

Write a balanced chemical equation for the following: Producing ethane from bromo-ethane using Zn / Cu couple in alcohol.

Alkyl halides are used to prepare respective alkanes. Bromo-ethane (ethyl bromide) gets reduced in the presence of Zn / Cu couple in alcohol and converts into ethane and forms hydrogen bromide. C 2 H 5 Br + 2 H → Zn / Cu couple in alcohol C 2 H 6 + HBr

MEDIUM

Earn 100

Hydrogenation of cyclohexene and benzene take place as shown below. The resonance energy of benzene is $- 36 {kcalmol}^{- 1}$

The relationship between $x$ and $y$ is

50% studentsanswered this correctly

Important Questions on Hydrocarbons

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

In the reaction of

1 -

bromo

- 3 -

chlorocyclobutane with two equivalents of sodium in ether, the major product is

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Among the following reactions, the reaction that "does not" give alkane product is

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

How many grams of cyclohexanol is required to produce

20 g

cyclohexane, if

%

yield is

54 %

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Write a balanced chemical equation for the preparation of Methane from sodium acetate.

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Alkyl halides react with dialkyl copper reagents to give

HARD

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

State one relevant reason for the following:

Soda-lime is preferred to sodium hydroxide in the laboratory preparation of methane.

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

By which of the following reactions, methane can't be prepared:

A =

Wurtz reaction

B =

Reduction of alkyl halides with zinc and dil.

HCl

C =

Kolbe's electrolysis

D =

Catalytic hydrogenation of alkenes

HARD

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

A sample of

4.5 mg

of an unknown monohydric alcohol,

R - OH

was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be

3.1 mL

. The molecular weight of the unknown alcohol is

g / mol

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Which of the following alkane cannot be made in good yield by Wurtz reaction?

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

If a mixture of iodomethane and iodoethane is treated with sodium metal in presence of dry ether it forms

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Write the general equation for Wurtz reaction.

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Which of the following reactions produce(s) propane as a major product?

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

{CH}_{3} Br + 2 Na + {CH}_{3} Br \overset{Dry ether}{\to} {CH}_{3} - {CH}_{3} + 2 NaBr

The reaction is

HARD

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Write a balanced chemical equation for the following:

Producing ethane from bromo-ethane using $Zn / Cu$ couple in alcohol.

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

What is hydrogenation? What is its industrial application?

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Hydrocarbon

(A)

reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms,

(A)

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

100 mL

solution of

{CH}_{3} {CH}_{2} MgBr

on treatment with methanol produces

2.24 mL

of a gas at STP. The weight of gas produced is____mg (nearest integer)

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

Write a short note on 'Wurtz reaction'.

MEDIUM

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

How many gram of sodium (atomic mass 23 u) is required to prepare one mole of ethane from methyl chloride by Wurtz reaction?

EASY

Chemistry>Organic Chemistry>Hydrocarbons>Alkanes

The gas evolved on heating

C H_{3} M g B r

in methanol is:

Hydrogenation of cyclohexene and benzene take place as shown below. The resonance energy of benzene is -36 kcalmol-1 The relationship between x and y is

Important Questions on Hydrocarbons

Learn and Prepare for any exam you want !

Hydrogenation of cyclohexene and benzene take place as shown below. The resonance energy of benzene is $- 36 {kcalmol}^{- 1}$

The relationship between $x$ and $y$ is