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Hydrocarbons

230203 An alkane with a molecular formula $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitutionally isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . What is the most reasonable starting alkane?

1

n

-Hexane

2 2,2 Dimethylbutane

3 2,3-Dimethylbutane

4 3-Methylpentane

Explanation:

: An alkane with a molecular formula, $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitution isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . Hexane reacts with chlorine in the presence of light and heat it gives two isomene products of 2,3 dimethyl chloride has two constitutional isomers with molecular formula of $C_{6} H_{13} Cl$ .

J and K CET-(2011)

Hydrocarbons

230206 Which of the following gas, diffuse most slowly?

1

C_{2} H_{6}

2

C_{2} H_{4}

3

{CH}_{4}

4 All of these diffuse at equal rate

Explanation:

: According to Graham's law of diffusion, r $\propto \frac{1}{\sqrt{M}}$ where, $M =$ molar mass. The gas which least molar mass that can diffuse easily. The gas which has high molar mass that can diffuse slowly. Therefore, among the given gases $C_{2} H_{6}$ diffuse slowly.

JCECE - 2004

Hydrocarbons

230211 Which of the following is least soluble in water?

1

C_{2} H_{6}

2

{CH}_{3} OH

3

{CH}_{3} {NH}_{2}

4

C_{6} H_{5} OH

Explanation:

: Alkanes is saturated hydrocarbon molecule and are non-polar molecules. The general formula of alkane is $C_{n} H_{2 n + 2}$ . Hence, $C_{2} H_{6}$ is being a non-polar and least soluble in water.

JIPMER-2017

Hydrocarbons

230213 Which of the following reagents converts both acetaldehyde and acetone alkanes?

1

Ni / H_{2}

2

{LiAl}_{H}^{4}

3

I_{2} / NaOH

4

Zn - Hg /

conc.

HCI

Explanation:

: The reagent which convert to both acetaldehyde and acetone alkane. By $Zn - Hg /$ conc. $HCl$ reagent.
The reduction of ketones aldehydes to alkane using zinc amalgam and hydrochloric acid.

JIPMER-2009

Hydrocarbons

230203 An alkane with a molecular formula $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitutionally isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . What is the most reasonable starting alkane?

1

n

-Hexane

2 2,2 Dimethylbutane

3 2,3-Dimethylbutane

4 3-Methylpentane

Explanation:

: An alkane with a molecular formula, $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitution isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . Hexane reacts with chlorine in the presence of light and heat it gives two isomene products of 2,3 dimethyl chloride has two constitutional isomers with molecular formula of $C_{6} H_{13} Cl$ .

J and K CET-(2011)

Hydrocarbons

230206 Which of the following gas, diffuse most slowly?

1

C_{2} H_{6}

2

C_{2} H_{4}

3

{CH}_{4}

4 All of these diffuse at equal rate

Explanation:

: According to Graham's law of diffusion, r $\propto \frac{1}{\sqrt{M}}$ where, $M =$ molar mass. The gas which least molar mass that can diffuse easily. The gas which has high molar mass that can diffuse slowly. Therefore, among the given gases $C_{2} H_{6}$ diffuse slowly.

JCECE - 2004

Hydrocarbons

230211 Which of the following is least soluble in water?

1

C_{2} H_{6}

2

{CH}_{3} OH

3

{CH}_{3} {NH}_{2}

4

C_{6} H_{5} OH

Explanation:

: Alkanes is saturated hydrocarbon molecule and are non-polar molecules. The general formula of alkane is $C_{n} H_{2 n + 2}$ . Hence, $C_{2} H_{6}$ is being a non-polar and least soluble in water.

JIPMER-2017

Hydrocarbons

230213 Which of the following reagents converts both acetaldehyde and acetone alkanes?

1

Ni / H_{2}

2

{LiAl}_{H}^{4}

3

I_{2} / NaOH

4

Zn - Hg /

conc.

HCI

Explanation:

: The reagent which convert to both acetaldehyde and acetone alkane. By $Zn - Hg /$ conc. $HCl$ reagent.
The reduction of ketones aldehydes to alkane using zinc amalgam and hydrochloric acid.

JIPMER-2009

Hydrocarbons

230203 An alkane with a molecular formula $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitutionally isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . What is the most reasonable starting alkane?

1

n

-Hexane

2 2,2 Dimethylbutane

3 2,3-Dimethylbutane

4 3-Methylpentane

Explanation:

: An alkane with a molecular formula, $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitution isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . Hexane reacts with chlorine in the presence of light and heat it gives two isomene products of 2,3 dimethyl chloride has two constitutional isomers with molecular formula of $C_{6} H_{13} Cl$ .

J and K CET-(2011)

Hydrocarbons

230206 Which of the following gas, diffuse most slowly?

1

C_{2} H_{6}

2

C_{2} H_{4}

3

{CH}_{4}

4 All of these diffuse at equal rate

Explanation:

: According to Graham's law of diffusion, r $\propto \frac{1}{\sqrt{M}}$ where, $M =$ molar mass. The gas which least molar mass that can diffuse easily. The gas which has high molar mass that can diffuse slowly. Therefore, among the given gases $C_{2} H_{6}$ diffuse slowly.

JCECE - 2004

Hydrocarbons

230211 Which of the following is least soluble in water?

1

C_{2} H_{6}

2

{CH}_{3} OH

3

{CH}_{3} {NH}_{2}

4

C_{6} H_{5} OH

Explanation:

: Alkanes is saturated hydrocarbon molecule and are non-polar molecules. The general formula of alkane is $C_{n} H_{2 n + 2}$ . Hence, $C_{2} H_{6}$ is being a non-polar and least soluble in water.

JIPMER-2017

Hydrocarbons

230213 Which of the following reagents converts both acetaldehyde and acetone alkanes?

1

Ni / H_{2}

2

{LiAl}_{H}^{4}

3

I_{2} / NaOH

4

Zn - Hg /

conc.

HCI

Explanation:

: The reagent which convert to both acetaldehyde and acetone alkane. By $Zn - Hg /$ conc. $HCl$ reagent.
The reduction of ketones aldehydes to alkane using zinc amalgam and hydrochloric acid.

JIPMER-2009

Hydrocarbons

230203 An alkane with a molecular formula $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitutionally isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . What is the most reasonable starting alkane?

1

n

-Hexane

2 2,2 Dimethylbutane

3 2,3-Dimethylbutane

4 3-Methylpentane

Explanation:

: An alkane with a molecular formula, $C_{6} H_{14}$ reacts with chlorine in the presence of light and heat to give two constitution isomeric monochlorides of molecular formula $C_{6} H_{13} Cl$ . Hexane reacts with chlorine in the presence of light and heat it gives two isomene products of 2,3 dimethyl chloride has two constitutional isomers with molecular formula of $C_{6} H_{13} Cl$ .

J and K CET-(2011)

Hydrocarbons

230206 Which of the following gas, diffuse most slowly?

1

C_{2} H_{6}

2

C_{2} H_{4}

3

{CH}_{4}

4 All of these diffuse at equal rate

Explanation:

: According to Graham's law of diffusion, r $\propto \frac{1}{\sqrt{M}}$ where, $M =$ molar mass. The gas which least molar mass that can diffuse easily. The gas which has high molar mass that can diffuse slowly. Therefore, among the given gases $C_{2} H_{6}$ diffuse slowly.

JCECE - 2004

Hydrocarbons

230211 Which of the following is least soluble in water?

1

C_{2} H_{6}

2

{CH}_{3} OH

3

{CH}_{3} {NH}_{2}

4

C_{6} H_{5} OH

Explanation:

: Alkanes is saturated hydrocarbon molecule and are non-polar molecules. The general formula of alkane is $C_{n} H_{2 n + 2}$ . Hence, $C_{2} H_{6}$ is being a non-polar and least soluble in water.

JIPMER-2017

Hydrocarbons

230213 Which of the following reagents converts both acetaldehyde and acetone alkanes?

1

Ni / H_{2}

2

{LiAl}_{H}^{4}

3

I_{2} / NaOH

4

Zn - Hg /

conc.

HCI

Explanation:

: The reagent which convert to both acetaldehyde and acetone alkane. By $Zn - Hg /$ conc. $HCl$ reagent.
The reduction of ketones aldehydes to alkane using zinc amalgam and hydrochloric acid.

JIPMER-2009

Question Bank Series

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