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12th Standard Chemistry English Medium - Hydroxy Compounds and Ethers 2 Mark Book Back Question Paper and Answer Key 2022 - 2023

Published on: 02/09/2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Chemistry Subject - Hydroxy Compounds and Ethers, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

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Std: 12th Standard - Chemistry

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Questions:

Generic 2

6 x 2 = 12

Complete the following reactions
ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)

Complete the following reactions
i) CH_3- CH₂ - OH \(\overset { { P}{ Br_3 }{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { aq.NaOH}{ }{ } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { { Na}{ } }{ \underset { {} }{ \longrightarrow } }\) C
ii) C₆H₅- OH \(\overset { { Zn \ dust}{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { CH_3}{Cl}{ } }{ \underset { {Anhydrs}{AlCl_3} }{ \longrightarrow } }\) B \(\overset { { acid}{K MnO_4}{ } }{ \underset { {} }{ \longrightarrow } }\) C

How are the following conversions effected
i) benzylchloride to benzylalcohol
ii) benzyalalcohol to benzoic acid

Complete the following reactions

ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)

What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane

Write the structure of the aldehyde, carboxylic acid and ester that yield 4- methylpent -2-en-1-ol.

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Answers Key:

Generic 2

6 x 2 = 12

(i) Benzylchloride to benzylalcohol
\(\underset { Benzyl \ chloride }{ { C }_{ 6 }{ H }_{ 5 }{ CH }_{ 2 }Cl } + NaOH { \longrightarrow } \underset { Benzyl \ alcohol }{ { C }_{ 6 }{ H }_{ 5 }{ CH }_{ 2 }OH } +NaCl\)
(ii) benzyalalcohol to benzoic acid
\(\underset { Benzyl \ alcohol }{\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{OH} }\stackrel{\mathrm{Na}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} / \mathrm{H}^{+}}{\longrightarrow}\underset { Benzaldehyde } {\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}}\stackrel{\mathrm{Na}_{2} \mathrm{CrO}_{7} / \mathrm{H}^{+}}{\longrightarrow} \underset { Benzoic \ acid } {\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}}\)

(i)
n-Nitro benzoate (Major Product)

(ii)

Ethers having same molecular formula, but alkyl groups attached to the oxygen atom are different. This phenomenon is known as metamerism.
Metamers of 2- methoxy propane
\(\mathrm{C}_{2} \mathrm{H}_{5}-\mathrm{O}-\mathrm{C}_{2} \mathrm{H}_{5}-\) diethyl ether
\(\mathrm{CH}_{3}-\mathrm{O}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}\) methyl n-propyl ether