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

322910 \({\mathrm{\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br}+\mathrm{NaOH}}}$${\mathrm{\xrightarrow{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}}}}\) Product A
supporting img
Consider the above reactions, identify product B and product C .

1 \({\mathrm{\mathrm{B}=\mathrm{C}=1}}\) - Propanol
2 \({\mathrm{\mathrm{B}=2}}\)-Propanol, \({\mathrm{\mathrm{C}=1}}\)-Propanol
3 \({\mathrm{\mathrm{B}=}}\) 1-Propanol, \({\mathrm{\mathrm{C}=2}}\)-Propanol
4 \({\mathrm{\mathrm{B}=\mathrm{C}=2}}\)-Propanol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO}}\)
2 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
4 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{COH}}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by \(\mathrm{H}_{2} \mathrm{O}_{2}\) in the presence of aqueous \(\mathrm{NaOH}\).
2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.
3 Alcohol is obtained in the poor yield.
4 All of the above.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol
2 propyl alcohol
3 iso-butyl alcohol
4 methyl alcohol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 \({\mathrm{\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br}+\mathrm{NaOH}}}$${\mathrm{\xrightarrow{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}}}}\) Product A
supporting img
Consider the above reactions, identify product B and product C .

1 \({\mathrm{\mathrm{B}=\mathrm{C}=1}}\) - Propanol
2 \({\mathrm{\mathrm{B}=2}}\)-Propanol, \({\mathrm{\mathrm{C}=1}}\)-Propanol
3 \({\mathrm{\mathrm{B}=}}\) 1-Propanol, \({\mathrm{\mathrm{C}=2}}\)-Propanol
4 \({\mathrm{\mathrm{B}=\mathrm{C}=2}}\)-Propanol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO}}\)
2 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
4 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{COH}}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by \(\mathrm{H}_{2} \mathrm{O}_{2}\) in the presence of aqueous \(\mathrm{NaOH}\).
2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.
3 Alcohol is obtained in the poor yield.
4 All of the above.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol
2 propyl alcohol
3 iso-butyl alcohol
4 methyl alcohol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 \({\mathrm{\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br}+\mathrm{NaOH}}}$${\mathrm{\xrightarrow{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}}}}\) Product A
supporting img
Consider the above reactions, identify product B and product C .

1 \({\mathrm{\mathrm{B}=\mathrm{C}=1}}\) - Propanol
2 \({\mathrm{\mathrm{B}=2}}\)-Propanol, \({\mathrm{\mathrm{C}=1}}\)-Propanol
3 \({\mathrm{\mathrm{B}=}}\) 1-Propanol, \({\mathrm{\mathrm{C}=2}}\)-Propanol
4 \({\mathrm{\mathrm{B}=\mathrm{C}=2}}\)-Propanol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO}}\)
2 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
4 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{COH}}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by \(\mathrm{H}_{2} \mathrm{O}_{2}\) in the presence of aqueous \(\mathrm{NaOH}\).
2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.
3 Alcohol is obtained in the poor yield.
4 All of the above.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol
2 propyl alcohol
3 iso-butyl alcohol
4 methyl alcohol
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 \({\mathrm{\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br}+\mathrm{NaOH}}}$${\mathrm{\xrightarrow{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}}}}\) Product A
supporting img
Consider the above reactions, identify product B and product C .

1 \({\mathrm{\mathrm{B}=\mathrm{C}=1}}\) - Propanol
2 \({\mathrm{\mathrm{B}=2}}\)-Propanol, \({\mathrm{\mathrm{C}=1}}\)-Propanol
3 \({\mathrm{\mathrm{B}=}}\) 1-Propanol, \({\mathrm{\mathrm{C}=2}}\)-Propanol
4 \({\mathrm{\mathrm{B}=\mathrm{C}=2}}\)-Propanol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO}}\)
2 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
4 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{COH}}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by \(\mathrm{H}_{2} \mathrm{O}_{2}\) in the presence of aqueous \(\mathrm{NaOH}\).
2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.
3 Alcohol is obtained in the poor yield.
4 All of the above.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol
2 propyl alcohol
3 iso-butyl alcohol
4 methyl alcohol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 \({\mathrm{\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br}+\mathrm{NaOH}}}$${\mathrm{\xrightarrow{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}}}}\) Product A
supporting img
Consider the above reactions, identify product B and product C .

1 \({\mathrm{\mathrm{B}=\mathrm{C}=1}}\) - Propanol
2 \({\mathrm{\mathrm{B}=2}}\)-Propanol, \({\mathrm{\mathrm{C}=1}}\)-Propanol
3 \({\mathrm{\mathrm{B}=}}\) 1-Propanol, \({\mathrm{\mathrm{C}=2}}\)-Propanol
4 \({\mathrm{\mathrm{B}=\mathrm{C}=2}}\)-Propanol
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO}}\)
2 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
4 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{COH}}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{MgBr}+\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by \(\mathrm{H}_{2} \mathrm{O}_{2}\) in the presence of aqueous \(\mathrm{NaOH}\).
2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.
3 Alcohol is obtained in the poor yield.
4 All of the above.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol
2 propyl alcohol
3 iso-butyl alcohol
4 methyl alcohol