322770
\(\mathrm{CCl}_{4}\) 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 \(500^{\circ} \mathrm{C}\) to from phosgene, a poisonous gas. \(\mathrm{CCl}_{4}+\mathrm{H}_{2} \mathrm{O} \stackrel{500^{\circ} \mathrm{C}}{\longrightarrow} \underset{\text { phosgene }}{\mathrm{COCl}_{2}}+2 \mathrm{HCl}\)
CHXII10:HALOALKANES AND HALOARENES
322771
Which of the following is used as fire extinguisher under the name pyrene?
1 \(\mathrm{CO}_{2}\)
2 \(\mathrm{CCl}_{4}\)
3 \(\mathrm{Ph}-\mathrm{COCH}_{2} \mathrm{Cl}\)
4 \(\mathrm{Ph}-\mathrm{Cl}\)
Explanation:
Conceptual Questions
CHXII10:HALOALKANES AND HALOARENES
322772
Assertion : \(\mathrm{CCl}_{4}\) is a fire extinguisher. Reason : \(\mathrm{CCl}_{4}\) 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:
\(\mathrm{CCl}_{4}\) 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. \(\mathrm{CCl}_{4}\) is insoluble in water as it is non-polar. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322773
\(\mathrm{CCl}_{4}\) cannot give precipitate with \(\mathrm{AgNO}_{3}\) due to
1 Formation of complex with \(\mathrm{AgNO}_{3}\)
2 Evolution of \(\mathrm{Cl}_{2}\) gas
3 Chloride ion is not formed
4 \(\mathrm{AgNO}_{3}\) does not give silver ion
Explanation:
\(\mathrm{CCl}_{4}\) is a covalent compound. Hence it does not give \(\mathrm{Cl}^{-}\)ions in solution.
CHXII10:HALOALKANES AND HALOARENES
322774
Number of moles of nascent hydrogen atoms required in the reduction of one mole of \(\mathrm{CHCl}_{3}\) to \(\mathrm{CH}_{4}\) with \(\mathrm{Zn}+\mathrm{H}_{2} \mathrm{O}\) are
322770
\(\mathrm{CCl}_{4}\) 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 \(500^{\circ} \mathrm{C}\) to from phosgene, a poisonous gas. \(\mathrm{CCl}_{4}+\mathrm{H}_{2} \mathrm{O} \stackrel{500^{\circ} \mathrm{C}}{\longrightarrow} \underset{\text { phosgene }}{\mathrm{COCl}_{2}}+2 \mathrm{HCl}\)
CHXII10:HALOALKANES AND HALOARENES
322771
Which of the following is used as fire extinguisher under the name pyrene?
1 \(\mathrm{CO}_{2}\)
2 \(\mathrm{CCl}_{4}\)
3 \(\mathrm{Ph}-\mathrm{COCH}_{2} \mathrm{Cl}\)
4 \(\mathrm{Ph}-\mathrm{Cl}\)
Explanation:
Conceptual Questions
CHXII10:HALOALKANES AND HALOARENES
322772
Assertion : \(\mathrm{CCl}_{4}\) is a fire extinguisher. Reason : \(\mathrm{CCl}_{4}\) 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:
\(\mathrm{CCl}_{4}\) 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. \(\mathrm{CCl}_{4}\) is insoluble in water as it is non-polar. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322773
\(\mathrm{CCl}_{4}\) cannot give precipitate with \(\mathrm{AgNO}_{3}\) due to
1 Formation of complex with \(\mathrm{AgNO}_{3}\)
2 Evolution of \(\mathrm{Cl}_{2}\) gas
3 Chloride ion is not formed
4 \(\mathrm{AgNO}_{3}\) does not give silver ion
Explanation:
\(\mathrm{CCl}_{4}\) is a covalent compound. Hence it does not give \(\mathrm{Cl}^{-}\)ions in solution.
CHXII10:HALOALKANES AND HALOARENES
322774
Number of moles of nascent hydrogen atoms required in the reduction of one mole of \(\mathrm{CHCl}_{3}\) to \(\mathrm{CH}_{4}\) with \(\mathrm{Zn}+\mathrm{H}_{2} \mathrm{O}\) are
322770
\(\mathrm{CCl}_{4}\) 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 \(500^{\circ} \mathrm{C}\) to from phosgene, a poisonous gas. \(\mathrm{CCl}_{4}+\mathrm{H}_{2} \mathrm{O} \stackrel{500^{\circ} \mathrm{C}}{\longrightarrow} \underset{\text { phosgene }}{\mathrm{COCl}_{2}}+2 \mathrm{HCl}\)
CHXII10:HALOALKANES AND HALOARENES
322771
Which of the following is used as fire extinguisher under the name pyrene?
1 \(\mathrm{CO}_{2}\)
2 \(\mathrm{CCl}_{4}\)
3 \(\mathrm{Ph}-\mathrm{COCH}_{2} \mathrm{Cl}\)
4 \(\mathrm{Ph}-\mathrm{Cl}\)
Explanation:
Conceptual Questions
CHXII10:HALOALKANES AND HALOARENES
322772
Assertion : \(\mathrm{CCl}_{4}\) is a fire extinguisher. Reason : \(\mathrm{CCl}_{4}\) 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:
\(\mathrm{CCl}_{4}\) 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. \(\mathrm{CCl}_{4}\) is insoluble in water as it is non-polar. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322773
\(\mathrm{CCl}_{4}\) cannot give precipitate with \(\mathrm{AgNO}_{3}\) due to
1 Formation of complex with \(\mathrm{AgNO}_{3}\)
2 Evolution of \(\mathrm{Cl}_{2}\) gas
3 Chloride ion is not formed
4 \(\mathrm{AgNO}_{3}\) does not give silver ion
Explanation:
\(\mathrm{CCl}_{4}\) is a covalent compound. Hence it does not give \(\mathrm{Cl}^{-}\)ions in solution.
CHXII10:HALOALKANES AND HALOARENES
322774
Number of moles of nascent hydrogen atoms required in the reduction of one mole of \(\mathrm{CHCl}_{3}\) to \(\mathrm{CH}_{4}\) with \(\mathrm{Zn}+\mathrm{H}_{2} \mathrm{O}\) are
322770
\(\mathrm{CCl}_{4}\) 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 \(500^{\circ} \mathrm{C}\) to from phosgene, a poisonous gas. \(\mathrm{CCl}_{4}+\mathrm{H}_{2} \mathrm{O} \stackrel{500^{\circ} \mathrm{C}}{\longrightarrow} \underset{\text { phosgene }}{\mathrm{COCl}_{2}}+2 \mathrm{HCl}\)
CHXII10:HALOALKANES AND HALOARENES
322771
Which of the following is used as fire extinguisher under the name pyrene?
1 \(\mathrm{CO}_{2}\)
2 \(\mathrm{CCl}_{4}\)
3 \(\mathrm{Ph}-\mathrm{COCH}_{2} \mathrm{Cl}\)
4 \(\mathrm{Ph}-\mathrm{Cl}\)
Explanation:
Conceptual Questions
CHXII10:HALOALKANES AND HALOARENES
322772
Assertion : \(\mathrm{CCl}_{4}\) is a fire extinguisher. Reason : \(\mathrm{CCl}_{4}\) 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:
\(\mathrm{CCl}_{4}\) 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. \(\mathrm{CCl}_{4}\) is insoluble in water as it is non-polar. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322773
\(\mathrm{CCl}_{4}\) cannot give precipitate with \(\mathrm{AgNO}_{3}\) due to
1 Formation of complex with \(\mathrm{AgNO}_{3}\)
2 Evolution of \(\mathrm{Cl}_{2}\) gas
3 Chloride ion is not formed
4 \(\mathrm{AgNO}_{3}\) does not give silver ion
Explanation:
\(\mathrm{CCl}_{4}\) is a covalent compound. Hence it does not give \(\mathrm{Cl}^{-}\)ions in solution.
CHXII10:HALOALKANES AND HALOARENES
322774
Number of moles of nascent hydrogen atoms required in the reduction of one mole of \(\mathrm{CHCl}_{3}\) to \(\mathrm{CH}_{4}\) with \(\mathrm{Zn}+\mathrm{H}_{2} \mathrm{O}\) are
322770
\(\mathrm{CCl}_{4}\) 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 \(500^{\circ} \mathrm{C}\) to from phosgene, a poisonous gas. \(\mathrm{CCl}_{4}+\mathrm{H}_{2} \mathrm{O} \stackrel{500^{\circ} \mathrm{C}}{\longrightarrow} \underset{\text { phosgene }}{\mathrm{COCl}_{2}}+2 \mathrm{HCl}\)
CHXII10:HALOALKANES AND HALOARENES
322771
Which of the following is used as fire extinguisher under the name pyrene?
1 \(\mathrm{CO}_{2}\)
2 \(\mathrm{CCl}_{4}\)
3 \(\mathrm{Ph}-\mathrm{COCH}_{2} \mathrm{Cl}\)
4 \(\mathrm{Ph}-\mathrm{Cl}\)
Explanation:
Conceptual Questions
CHXII10:HALOALKANES AND HALOARENES
322772
Assertion : \(\mathrm{CCl}_{4}\) is a fire extinguisher. Reason : \(\mathrm{CCl}_{4}\) 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:
\(\mathrm{CCl}_{4}\) 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. \(\mathrm{CCl}_{4}\) is insoluble in water as it is non-polar. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322773
\(\mathrm{CCl}_{4}\) cannot give precipitate with \(\mathrm{AgNO}_{3}\) due to
1 Formation of complex with \(\mathrm{AgNO}_{3}\)
2 Evolution of \(\mathrm{Cl}_{2}\) gas
3 Chloride ion is not formed
4 \(\mathrm{AgNO}_{3}\) does not give silver ion
Explanation:
\(\mathrm{CCl}_{4}\) is a covalent compound. Hence it does not give \(\mathrm{Cl}^{-}\)ions in solution.
CHXII10:HALOALKANES AND HALOARENES
322774
Number of moles of nascent hydrogen atoms required in the reduction of one mole of \(\mathrm{CHCl}_{3}\) to \(\mathrm{CH}_{4}\) with \(\mathrm{Zn}+\mathrm{H}_{2} \mathrm{O}\) are
