CBSE 12th Standard Chemistry Subject Alcohols , Phenols and Ethers Ncert Exemplar 2 Mark Questions 2021
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CBSE 12th Standard Chemistry Subject Alcohols , Phenols and Ethers Ncert Exemplar 2 Mark Questions 2021
12th Standard CBSE
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Reg.No. :
Chemistry
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What is the structure abd IUPAC name of glycerol?
(a) -
Name the factors responsible for the solubility of alcohols in water.
(a) -
Suggest a reagent for conversion of ethanol to ethanal.
(a) -
Suggest a reagent for conversion of ethanol to ethanoic acid.
(a) -
Out of 0-nitrophenol and p-nitrophenol, which volatile? Explain.
(a)
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CBSE 12th Standard Chemistry Subject Alcohols , Phenols and Ethers Ncert Exemplar 2 Mark Questions 2021 Answer Keys
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HO-CH2-CHOH-CH2OH, Propane-1, 2, 3-triol.
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(i) Hydrogen bonding
(ii) Size of alkyl/aryl group. -
Pyridinium chlorochromate in CH2CI2
\(\underset { Ethanol }{ CH_{ 3 }CH_{ 2 }OH } \overset { { C }_{ 5 }{ H }_{ 5 }{ NH }^{ + }{ CrO }_{ 3 }{ Cl }^{ - } }{ \underset { CH_{ 2 }{ Cl }_{ 2 } }{ \longrightarrow } } \underset { Ethanol }{ CH_{ 3 }CHO } \) -
Any strong oxidising agent such as acidified KMnO4 or K2Cr2O7.
\(\underset { Ethanol }{ CH_{ 3 }CH_{ 2 }OH\ } \overset { KMn{ O }_{ 4 }/\ { H }_{ 2 }{ SO }_{ 4 } }{ \underset { orK_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 }\ /{ H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow }} \underset { EthanoIC\ acid }{ CH_{ 3 }COHH } \) -
o-Nitrophenol exists as discrete molecules due to intramolecular H-bonding (i.e., chelation) and hence is more volatile than p-nitrophenol which exists as an associated molecule due to intermolecular H-bonding. For structures of chelated and associated molecules.
