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CBSE
Class 12 Chemistry
Aldehydes, Ketones And Carboxylic Acids
Quiz 1
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benzaldehyde
0%
3 and 4 only
0%
2 and 5 only
0%
1, 2 and 3 only
0%
2, 3 and 5 only
Explanation
2 and 5 only
Aldehydes other than formaldehyde react with Grignard’s reagent to give addition products which on hydrolysis give
0%
tertiary alcohols
0%
secondary alcohols
0%
primary alcohols
0%
carboxylic acids
Explanation
secondary alcohols
Which of the following will not give aldol condensation?
0%
Phenyl acetaldehyde
0%
2-Methylpentanal
0%
Benzaldehyde
0%
1-Phenylpropanone
Explanation
Benzaldehyde
The product of hydrolysis of ozonide of 1-butene are
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ethanol only
0%
ethanal and methanal
0%
propanal and methanal
0%
methanal only
Explanation
propanal and methanal
α-Hydroxypropanoic acid can be preapred from ethanal by following the steps given in the sequence
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Treat with HCN followed by acidic hydrolysis
0%
Treat with NaHSO followed by reaction with NaCO
0%
Treat with HSO
0%
Treat with KCrO
Explanation
Treat with HCN followed by acidic hydrolysis
Benzoyl Chloride on reduction with H/Pd-BaSO produces
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benzoic acid
0%
benzyl alochol
0%
benzoyl sulphate
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benzaldehyde
Explanation
benzaldehyde
What is the test to differentiate between penta-2-one and pentan-3-one?
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Iodoform test
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Benedict’s test
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Fehling’s test
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Aldol condensation test
Explanation
Iodoform test
Which of the following does not undergoCannizzarro’s reaction?
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Benzaldehyde
0%
2-Methylpropanal
0%
p-Methoxybenzaldehyde
0%
2, 2-Dimethylpropanal
Explanation
2-Methylpropanal
The best oxidising agent- for oxidation of CH-CH = CH-CHO to CH-CH = CH-COOH is
0%
Baeyefs reagent
0%
Tollen’s reagent
0%
SchifFs reagent
0%
Acidified dichromate
Explanation
Tollen’s reagent
Study the given reaction and identify the process which is carried out
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It is used for purification of aldehydes and ketones
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It is used to distinguish aldehydes from ketones
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It is used to prepare cyclic aldehydes and ketones
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It is used to study polar nature of aldehydes and ketones
Explanation
It is used for purification of aldehydes and ketones
Hydrocarbons are formed when aldehydes and ketones are reacted with amalgamated zinc and conc. HCl. The reaction is called
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Cannizzaro reaction
0%
Clemmensen reduction
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Rosenmund reduction
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Wolff-Kishner reduction
Explanation
Clemmensen reduction
In the following sequence of reaction, the final product (Z) is
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ethanal
0%
propan-2-ol
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propanone
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propan-2-ol
Explanation
propanone
When propanal reacts with 2-methylpropanal in presence of NaOH, four different products are formed. The reaction is known as
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Aldol condensation
0%
Cross aldol condensation
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Cannizzaro reaction
0%
HVZ condensation
Explanation
Cross aldol condensation
Which of the following does not answer iodoform test?
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n-Butyl alcohol
0%
sec-Butyl alcohol
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Acetophenone
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Acetaldehyde
Explanation
n-Butyl alcohol
To differentiate between pentan-2-one and penta-3-one a test is carried out. Which of the following is the correct answer?
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Pentan-2-one will give silver mirror test
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Pentan-2-one will give iodoform test
0%
Pentan-3-one will give iodoform test
0%
None of these
Explanation
Pentan-2-one will give iodoform test
Which compound is obtained when acetaldehydes are treated with dilute solution of caustic soda?
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Sodium acetate
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Resinous mass
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Aldol
0%
Ethyl acetate
Explanation
Aldol
Identify the products (X) and (Y) in the given reaction
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X = Acetophenone, Y = m-N itroacetophone
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X = Toluene, Y = m-Nitroacetotoluene
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X = Acetophenone, Y = o- and p-Dinitroacetophenone
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X = Benzaldehyde, Y = m-Nitrobenzaldehyde
Explanation
X = Acetophenone, Y = m-N itroacetophone
0 h : 0 m : 1 s
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