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CHXII10:HALOALKANES AND HALOARENES

322770 ${CCl}_{4}$ is well known fire extinguisher. However after using it to extinguish fire, the room should be well ventilated. This is because

1 It is flammable at higher temperature

2 It is toxic

3 It produces phosgene by reaction with water vapour

4 It is corrosive

Explanation:

Carbon tetrachloride vapours react with steam above $500^{\circ} C$ to from phosgene, a poisonous gas.
${CCl}_{4} + H_{2} O \overset{500^{\circ} C}{⟶} \underset{phosgene}{{COCl}_{2}} + 2 HCl$

CHXII10:HALOALKANES AND HALOARENES

322771 Which of the following is used as fire extinguisher under the name pyrene?

1

{CO}_{2}

2

{CCl}_{4}

3

Ph - {COCH}_{2} Cl

4

Ph - Cl

CHXII10:HALOALKANES AND HALOARENES

322772 Assertion :
${CCl}_{4}$ is a fire extinguisher.
Reason :
${CCl}_{4}$ is insoluble in water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CCl}_{4}$ is utilized as a fire extinguisher due to its dense, non-combustible vapors, which blanket the burning material, impeding the availability of oxygen necessary for combustion.
${CCl}_{4}$ is insoluble in water as it is non-polar. So option (2) is correct.

CHXII10:HALOALKANES AND HALOARENES

322773 ${CCl}_{4}$ cannot give precipitate with ${AgNO}_{3}$ due to

1 Formation of complex with

{AgNO}_{3}

2 Evolution of

{Cl}_{2}

gas

3 Chloride ion is not formed

4

{AgNO}_{3}

does not give silver ion

Explanation:

${CCl}_{4}$ is a covalent compound. Hence it does not give ${Cl}^{-}$ ions in solution.

CHXII10:HALOALKANES AND HALOARENES

322774 Number of moles of nascent hydrogen atoms required in the reduction of one mole of ${CHCl}_{3}$ to ${CH}_{4}$ with $Zn + H_{2} O$ are

1 2

2 4

3 6

4 3

Explanation:

${CHCl}_{3} + 6 H \to {CH}_{4} + 3 HCl$

CHXII10:HALOALKANES AND HALOARENES

322770 ${CCl}_{4}$ is well known fire extinguisher. However after using it to extinguish fire, the room should be well ventilated. This is because

1 It is flammable at higher temperature

2 It is toxic

3 It produces phosgene by reaction with water vapour

4 It is corrosive

Explanation:

Carbon tetrachloride vapours react with steam above $500^{\circ} C$ to from phosgene, a poisonous gas.
${CCl}_{4} + H_{2} O \overset{500^{\circ} C}{⟶} \underset{phosgene}{{COCl}_{2}} + 2 HCl$

CHXII10:HALOALKANES AND HALOARENES

322771 Which of the following is used as fire extinguisher under the name pyrene?

1

{CO}_{2}

2

{CCl}_{4}

3

Ph - {COCH}_{2} Cl

4

Ph - Cl

CHXII10:HALOALKANES AND HALOARENES

322772 Assertion :
${CCl}_{4}$ is a fire extinguisher.
Reason :
${CCl}_{4}$ is insoluble in water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CCl}_{4}$ is utilized as a fire extinguisher due to its dense, non-combustible vapors, which blanket the burning material, impeding the availability of oxygen necessary for combustion.
${CCl}_{4}$ is insoluble in water as it is non-polar. So option (2) is correct.

CHXII10:HALOALKANES AND HALOARENES

322773 ${CCl}_{4}$ cannot give precipitate with ${AgNO}_{3}$ due to

1 Formation of complex with

{AgNO}_{3}

2 Evolution of

{Cl}_{2}

gas

3 Chloride ion is not formed

4

{AgNO}_{3}

does not give silver ion

Explanation:

${CCl}_{4}$ is a covalent compound. Hence it does not give ${Cl}^{-}$ ions in solution.

CHXII10:HALOALKANES AND HALOARENES

322774 Number of moles of nascent hydrogen atoms required in the reduction of one mole of ${CHCl}_{3}$ to ${CH}_{4}$ with $Zn + H_{2} O$ are

1 2

2 4

3 6

4 3

Explanation:

${CHCl}_{3} + 6 H \to {CH}_{4} + 3 HCl$

CHXII10:HALOALKANES AND HALOARENES

322770 ${CCl}_{4}$ is well known fire extinguisher. However after using it to extinguish fire, the room should be well ventilated. This is because

1 It is flammable at higher temperature

2 It is toxic

3 It produces phosgene by reaction with water vapour

4 It is corrosive

Explanation:

Carbon tetrachloride vapours react with steam above $500^{\circ} C$ to from phosgene, a poisonous gas.
${CCl}_{4} + H_{2} O \overset{500^{\circ} C}{⟶} \underset{phosgene}{{COCl}_{2}} + 2 HCl$

CHXII10:HALOALKANES AND HALOARENES

322771 Which of the following is used as fire extinguisher under the name pyrene?

1

{CO}_{2}

2

{CCl}_{4}

3

Ph - {COCH}_{2} Cl

4

Ph - Cl

CHXII10:HALOALKANES AND HALOARENES

322772 Assertion :
${CCl}_{4}$ is a fire extinguisher.
Reason :
${CCl}_{4}$ is insoluble in water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CCl}_{4}$ is utilized as a fire extinguisher due to its dense, non-combustible vapors, which blanket the burning material, impeding the availability of oxygen necessary for combustion.
${CCl}_{4}$ is insoluble in water as it is non-polar. So option (2) is correct.

CHXII10:HALOALKANES AND HALOARENES

322773 ${CCl}_{4}$ cannot give precipitate with ${AgNO}_{3}$ due to

1 Formation of complex with

{AgNO}_{3}

2 Evolution of

{Cl}_{2}

gas

3 Chloride ion is not formed

4

{AgNO}_{3}

does not give silver ion

Explanation:

${CCl}_{4}$ is a covalent compound. Hence it does not give ${Cl}^{-}$ ions in solution.

CHXII10:HALOALKANES AND HALOARENES

322774 Number of moles of nascent hydrogen atoms required in the reduction of one mole of ${CHCl}_{3}$ to ${CH}_{4}$ with $Zn + H_{2} O$ are

1 2

2 4

3 6

4 3

Explanation:

${CHCl}_{3} + 6 H \to {CH}_{4} + 3 HCl$

CHXII10:HALOALKANES AND HALOARENES

322770 ${CCl}_{4}$ is well known fire extinguisher. However after using it to extinguish fire, the room should be well ventilated. This is because

1 It is flammable at higher temperature

2 It is toxic

3 It produces phosgene by reaction with water vapour

4 It is corrosive

Explanation:

Carbon tetrachloride vapours react with steam above $500^{\circ} C$ to from phosgene, a poisonous gas.
${CCl}_{4} + H_{2} O \overset{500^{\circ} C}{⟶} \underset{phosgene}{{COCl}_{2}} + 2 HCl$

CHXII10:HALOALKANES AND HALOARENES

322771 Which of the following is used as fire extinguisher under the name pyrene?

1

{CO}_{2}

2

{CCl}_{4}

3

Ph - {COCH}_{2} Cl

4

Ph - Cl

CHXII10:HALOALKANES AND HALOARENES

322772 Assertion :
${CCl}_{4}$ is a fire extinguisher.
Reason :
${CCl}_{4}$ is insoluble in water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CCl}_{4}$ is utilized as a fire extinguisher due to its dense, non-combustible vapors, which blanket the burning material, impeding the availability of oxygen necessary for combustion.
${CCl}_{4}$ is insoluble in water as it is non-polar. So option (2) is correct.

CHXII10:HALOALKANES AND HALOARENES

322773 ${CCl}_{4}$ cannot give precipitate with ${AgNO}_{3}$ due to

1 Formation of complex with

{AgNO}_{3}

2 Evolution of

{Cl}_{2}

gas

3 Chloride ion is not formed

4

{AgNO}_{3}

does not give silver ion

Explanation:

${CCl}_{4}$ is a covalent compound. Hence it does not give ${Cl}^{-}$ ions in solution.

CHXII10:HALOALKANES AND HALOARENES

322774 Number of moles of nascent hydrogen atoms required in the reduction of one mole of ${CHCl}_{3}$ to ${CH}_{4}$ with $Zn + H_{2} O$ are

1 2

2 4

3 6

4 3

Explanation:

${CHCl}_{3} + 6 H \to {CH}_{4} + 3 HCl$

CHXII10:HALOALKANES AND HALOARENES

322770 ${CCl}_{4}$ is well known fire extinguisher. However after using it to extinguish fire, the room should be well ventilated. This is because

1 It is flammable at higher temperature

2 It is toxic

3 It produces phosgene by reaction with water vapour

4 It is corrosive

Explanation:

Carbon tetrachloride vapours react with steam above $500^{\circ} C$ to from phosgene, a poisonous gas.
${CCl}_{4} + H_{2} O \overset{500^{\circ} C}{⟶} \underset{phosgene}{{COCl}_{2}} + 2 HCl$

CHXII10:HALOALKANES AND HALOARENES

322771 Which of the following is used as fire extinguisher under the name pyrene?

1

{CO}_{2}

2

{CCl}_{4}

3

Ph - {COCH}_{2} Cl

4

Ph - Cl

CHXII10:HALOALKANES AND HALOARENES

322772 Assertion :
${CCl}_{4}$ is a fire extinguisher.
Reason :
${CCl}_{4}$ is insoluble in water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CCl}_{4}$ is utilized as a fire extinguisher due to its dense, non-combustible vapors, which blanket the burning material, impeding the availability of oxygen necessary for combustion.
${CCl}_{4}$ is insoluble in water as it is non-polar. So option (2) is correct.

CHXII10:HALOALKANES AND HALOARENES

322773 ${CCl}_{4}$ cannot give precipitate with ${AgNO}_{3}$ due to

1 Formation of complex with

{AgNO}_{3}

2 Evolution of

{Cl}_{2}

gas

3 Chloride ion is not formed

4

{AgNO}_{3}

does not give silver ion

Explanation:

${CCl}_{4}$ is a covalent compound. Hence it does not give ${Cl}^{-}$ ions in solution.

CHXII10:HALOALKANES AND HALOARENES

322774 Number of moles of nascent hydrogen atoms required in the reduction of one mole of ${CHCl}_{3}$ to ${CH}_{4}$ with $Zn + H_{2} O$ are

1 2

2 4

3 6

4 3

Explanation:

${CHCl}_{3} + 6 H \to {CH}_{4} + 3 HCl$