Methods of Preparation of Alcohols
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322893 Which of the following pairs of the compounds can be used as starting materials in the synthesis of 2-phenyl-2-pentanol?

1 \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{MgBr}\) and \(\mathrm{PhCOOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{MgBr}\) and \(\mathrm{PhCOCH}_{3}\)
3 \(\mathrm{PhMgBr}\) and \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{3}\)
4 \(\mathrm{PhMgBr}\) and \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{COCH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322894 The acid catalysed hydration of alkene involves the following three steps.
I. Nucleophilic attack of water on carbocation.
II. Protonation of alkene to form carbocation by the electrophilic attack of \(\mathrm{H}_{3} \mathrm{O}^{+}\).
III. Deprotonation to form an alcohol.
Identify the sequence for the mechanism of reation in the acid catalysed hydration of alkenes.

1 I, II and III
2 II, I and III
3 III, I and II
4 III, II and I
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322895 Propene when treated with cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) forms a compound which on heating with water gives

1 propan-2-ol
2 butan-1-ol
3 ethanol
4 propan-1-ol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322896 Which one/ones of the following reactions will yield 2-propanol?
I. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow{{{{\text{H}}^{\text{ + }}}}}\)
II. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CHO}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) C}}{{\text{H}}_{\text{3}}}{\text{MgI}}}}\)
III.\({\text{C}}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgI}}}}\)
IV. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ Neutral KMn}}{{\text{O}}_{\text{4}}}}}\)

1 I and II
2 II and III
3 III and I
4 II and IV
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322897 supporting img

‘X’ would be

1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{LiAlH}_{4}\)
3 \(\mathrm{Pd} / \mathrm{C}\)
4 Raney Ni
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322893 Which of the following pairs of the compounds can be used as starting materials in the synthesis of 2-phenyl-2-pentanol?

1 \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{MgBr}\) and \(\mathrm{PhCOOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{MgBr}\) and \(\mathrm{PhCOCH}_{3}\)
3 \(\mathrm{PhMgBr}\) and \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{3}\)
4 \(\mathrm{PhMgBr}\) and \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{COCH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322894 The acid catalysed hydration of alkene involves the following three steps.
I. Nucleophilic attack of water on carbocation.
II. Protonation of alkene to form carbocation by the electrophilic attack of \(\mathrm{H}_{3} \mathrm{O}^{+}\).
III. Deprotonation to form an alcohol.
Identify the sequence for the mechanism of reation in the acid catalysed hydration of alkenes.

1 I, II and III
2 II, I and III
3 III, I and II
4 III, II and I
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322895 Propene when treated with cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) forms a compound which on heating with water gives

1 propan-2-ol
2 butan-1-ol
3 ethanol
4 propan-1-ol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322896 Which one/ones of the following reactions will yield 2-propanol?
I. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow{{{{\text{H}}^{\text{ + }}}}}\)
II. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CHO}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) C}}{{\text{H}}_{\text{3}}}{\text{MgI}}}}\)
III.\({\text{C}}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgI}}}}\)
IV. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ Neutral KMn}}{{\text{O}}_{\text{4}}}}}\)

1 I and II
2 II and III
3 III and I
4 II and IV
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322897 supporting img

‘X’ would be

1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{LiAlH}_{4}\)
3 \(\mathrm{Pd} / \mathrm{C}\)
4 Raney Ni
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322893 Which of the following pairs of the compounds can be used as starting materials in the synthesis of 2-phenyl-2-pentanol?

1 \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{MgBr}\) and \(\mathrm{PhCOOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{MgBr}\) and \(\mathrm{PhCOCH}_{3}\)
3 \(\mathrm{PhMgBr}\) and \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{3}\)
4 \(\mathrm{PhMgBr}\) and \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{COCH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322894 The acid catalysed hydration of alkene involves the following three steps.
I. Nucleophilic attack of water on carbocation.
II. Protonation of alkene to form carbocation by the electrophilic attack of \(\mathrm{H}_{3} \mathrm{O}^{+}\).
III. Deprotonation to form an alcohol.
Identify the sequence for the mechanism of reation in the acid catalysed hydration of alkenes.

1 I, II and III
2 II, I and III
3 III, I and II
4 III, II and I
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322895 Propene when treated with cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) forms a compound which on heating with water gives

1 propan-2-ol
2 butan-1-ol
3 ethanol
4 propan-1-ol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322896 Which one/ones of the following reactions will yield 2-propanol?
I. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow{{{{\text{H}}^{\text{ + }}}}}\)
II. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CHO}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) C}}{{\text{H}}_{\text{3}}}{\text{MgI}}}}\)
III.\({\text{C}}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgI}}}}\)
IV. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ Neutral KMn}}{{\text{O}}_{\text{4}}}}}\)

1 I and II
2 II and III
3 III and I
4 II and IV
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322897 supporting img

‘X’ would be

1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{LiAlH}_{4}\)
3 \(\mathrm{Pd} / \mathrm{C}\)
4 Raney Ni
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322893 Which of the following pairs of the compounds can be used as starting materials in the synthesis of 2-phenyl-2-pentanol?

1 \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{MgBr}\) and \(\mathrm{PhCOOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{MgBr}\) and \(\mathrm{PhCOCH}_{3}\)
3 \(\mathrm{PhMgBr}\) and \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{3}\)
4 \(\mathrm{PhMgBr}\) and \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{COCH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322894 The acid catalysed hydration of alkene involves the following three steps.
I. Nucleophilic attack of water on carbocation.
II. Protonation of alkene to form carbocation by the electrophilic attack of \(\mathrm{H}_{3} \mathrm{O}^{+}\).
III. Deprotonation to form an alcohol.
Identify the sequence for the mechanism of reation in the acid catalysed hydration of alkenes.

1 I, II and III
2 II, I and III
3 III, I and II
4 III, II and I
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322895 Propene when treated with cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) forms a compound which on heating with water gives

1 propan-2-ol
2 butan-1-ol
3 ethanol
4 propan-1-ol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322896 Which one/ones of the following reactions will yield 2-propanol?
I. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow{{{{\text{H}}^{\text{ + }}}}}\)
II. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CHO}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) C}}{{\text{H}}_{\text{3}}}{\text{MgI}}}}\)
III.\({\text{C}}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgI}}}}\)
IV. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ Neutral KMn}}{{\text{O}}_{\text{4}}}}}\)

1 I and II
2 II and III
3 III and I
4 II and IV
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322897 supporting img

‘X’ would be

1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{LiAlH}_{4}\)
3 \(\mathrm{Pd} / \mathrm{C}\)
4 Raney Ni
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322893 Which of the following pairs of the compounds can be used as starting materials in the synthesis of 2-phenyl-2-pentanol?

1 \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{MgBr}\) and \(\mathrm{PhCOOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{MgBr}\) and \(\mathrm{PhCOCH}_{3}\)
3 \(\mathrm{PhMgBr}\) and \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{3}\)
4 \(\mathrm{PhMgBr}\) and \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{COCH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322894 The acid catalysed hydration of alkene involves the following three steps.
I. Nucleophilic attack of water on carbocation.
II. Protonation of alkene to form carbocation by the electrophilic attack of \(\mathrm{H}_{3} \mathrm{O}^{+}\).
III. Deprotonation to form an alcohol.
Identify the sequence for the mechanism of reation in the acid catalysed hydration of alkenes.

1 I, II and III
2 II, I and III
3 III, I and II
4 III, II and I
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322895 Propene when treated with cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) forms a compound which on heating with water gives

1 propan-2-ol
2 butan-1-ol
3 ethanol
4 propan-1-ol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322896 Which one/ones of the following reactions will yield 2-propanol?
I. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow{{{{\text{H}}^{\text{ + }}}}}\)
II. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CHO}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) C}}{{\text{H}}_{\text{3}}}{\text{MgI}}}}\)
III.\({\text{C}}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow[{{\text{ (ii) }}{{\text{H}}_{\text{2}}}{\text{O}}}]{{{\text{ (i) }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgI}}}}\)
IV. \({\text{C}}{{\text{H}}_{\text{2}}}{\text{ = CH - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ Neutral KMn}}{{\text{O}}_{\text{4}}}}}\)

1 I and II
2 II and III
3 III and I
4 II and IV
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322897 supporting img

‘X’ would be

1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{LiAlH}_{4}\)
3 \(\mathrm{Pd} / \mathrm{C}\)
4 Raney Ni