Reactions of Alcohols
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323201 Consider the following reaction
supporting img
In the above reaction, ester formation takes place by:

1 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{O}-\mathrm{H}\) bond of (B)
2 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{C }} - {\text{ O}}\) bond of (B)
3 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{C}-\mathrm{O}\) bond of (B)
4 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{O }} - {\text{ H}}\) bond of (B)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323202 \(0.037 \mathrm{~g}\) of an alcohol, \(\mathrm{R}-\mathrm{OH}\) was added to \(\mathrm{CH}_{3} \mathrm{MgBr}\) and the gas evolved measured 11.2 \(\mathrm{mL}\) at STP. The molecular mass of \(\mathrm{R}-\mathrm{OH}\) will be

1 47
2 79
3 74
4 77
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323203 An organic compound ' \({\text{A}}\) ' containing \({\text{C, H}}\) and \({\text{O}}\) has a pleasant odour with boiling point \(78^{\circ} \mathrm{C}\). On boiling 'A' with conc \(\mathrm{H}_{2} \mathrm{SO}_{4}\), a colourless gas is released. The organic liquid ' \({\text{A}}\) ' is :

1 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}\)
2 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COOCH}_{3}\)
3 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\)
4 \(\mathrm{C}_{2} \mathrm{H}_{6}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323204 Assertion :
An alcohol does not react with halide ions as such but on dissolution in strong acids it does react smoothly forming an alkyl halide.
Reason :
The strong acid accelerates the removal of proton from the -OH group of the alcohol.

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.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323201 Consider the following reaction
supporting img
In the above reaction, ester formation takes place by:

1 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{O}-\mathrm{H}\) bond of (B)
2 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{C }} - {\text{ O}}\) bond of (B)
3 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{C}-\mathrm{O}\) bond of (B)
4 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{O }} - {\text{ H}}\) bond of (B)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323202 \(0.037 \mathrm{~g}\) of an alcohol, \(\mathrm{R}-\mathrm{OH}\) was added to \(\mathrm{CH}_{3} \mathrm{MgBr}\) and the gas evolved measured 11.2 \(\mathrm{mL}\) at STP. The molecular mass of \(\mathrm{R}-\mathrm{OH}\) will be

1 47
2 79
3 74
4 77
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323203 An organic compound ' \({\text{A}}\) ' containing \({\text{C, H}}\) and \({\text{O}}\) has a pleasant odour with boiling point \(78^{\circ} \mathrm{C}\). On boiling 'A' with conc \(\mathrm{H}_{2} \mathrm{SO}_{4}\), a colourless gas is released. The organic liquid ' \({\text{A}}\) ' is :

1 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}\)
2 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COOCH}_{3}\)
3 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\)
4 \(\mathrm{C}_{2} \mathrm{H}_{6}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323204 Assertion :
An alcohol does not react with halide ions as such but on dissolution in strong acids it does react smoothly forming an alkyl halide.
Reason :
The strong acid accelerates the removal of proton from the -OH group of the alcohol.

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.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323201 Consider the following reaction
supporting img
In the above reaction, ester formation takes place by:

1 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{O}-\mathrm{H}\) bond of (B)
2 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{C }} - {\text{ O}}\) bond of (B)
3 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{C}-\mathrm{O}\) bond of (B)
4 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{O }} - {\text{ H}}\) bond of (B)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323202 \(0.037 \mathrm{~g}\) of an alcohol, \(\mathrm{R}-\mathrm{OH}\) was added to \(\mathrm{CH}_{3} \mathrm{MgBr}\) and the gas evolved measured 11.2 \(\mathrm{mL}\) at STP. The molecular mass of \(\mathrm{R}-\mathrm{OH}\) will be

1 47
2 79
3 74
4 77
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323203 An organic compound ' \({\text{A}}\) ' containing \({\text{C, H}}\) and \({\text{O}}\) has a pleasant odour with boiling point \(78^{\circ} \mathrm{C}\). On boiling 'A' with conc \(\mathrm{H}_{2} \mathrm{SO}_{4}\), a colourless gas is released. The organic liquid ' \({\text{A}}\) ' is :

1 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}\)
2 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COOCH}_{3}\)
3 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\)
4 \(\mathrm{C}_{2} \mathrm{H}_{6}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323204 Assertion :
An alcohol does not react with halide ions as such but on dissolution in strong acids it does react smoothly forming an alkyl halide.
Reason :
The strong acid accelerates the removal of proton from the -OH group of the alcohol.

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.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323201 Consider the following reaction
supporting img
In the above reaction, ester formation takes place by:

1 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{O}-\mathrm{H}\) bond of (B)
2 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{C }} - {\text{ O}}\) bond of (B)
3 Breaking of \(\mathrm{O}-\mathrm{H}\) bond of \((\mathrm{A})\) and \(\mathrm{C}-\mathrm{O}\) bond of (B)
4 Breaking of \({\text{C }} - {\text{ O}}\) bond of (A) and \({\text{O }} - {\text{ H}}\) bond of (B)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323202 \(0.037 \mathrm{~g}\) of an alcohol, \(\mathrm{R}-\mathrm{OH}\) was added to \(\mathrm{CH}_{3} \mathrm{MgBr}\) and the gas evolved measured 11.2 \(\mathrm{mL}\) at STP. The molecular mass of \(\mathrm{R}-\mathrm{OH}\) will be

1 47
2 79
3 74
4 77
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323203 An organic compound ' \({\text{A}}\) ' containing \({\text{C, H}}\) and \({\text{O}}\) has a pleasant odour with boiling point \(78^{\circ} \mathrm{C}\). On boiling 'A' with conc \(\mathrm{H}_{2} \mathrm{SO}_{4}\), a colourless gas is released. The organic liquid ' \({\text{A}}\) ' is :

1 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}\)
2 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COOCH}_{3}\)
3 \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\)
4 \(\mathrm{C}_{2} \mathrm{H}_{6}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

323204 Assertion :
An alcohol does not react with halide ions as such but on dissolution in strong acids it does react smoothly forming an alkyl halide.
Reason :
The strong acid accelerates the removal of proton from the -OH group of the alcohol.

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.