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JEE • CHEMISTRY • ALDEHYDES & KETONES & CARBOXYLIC ACIDS
Aldehydes & ketones & carboxylic acids practice · Medium
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Showing 151-165 of 165 questions
151
Medium
151 of 165
Analyzing
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and cannot be distinguished chemically by
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Correct option: D
lodoform test
Option D (lodoform test) is correct because both and give a positive iodoform test, so it cannot be used to distinguish them.
152
Medium
152 of 165
Remembering
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Alkaline hydrolysis of an ester is called:
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Correct option: D
Saponification
Option D (Saponification) is correct because alkaline hydrolysis of an ester is called saponification, which produces soap and alcohol.
153
Medium
153 of 165
Understanding
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Acetalsehyde reacts with:
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Correct option: B
Both electrophiles and nucleophiles
Option B (Both electrophiles and nucleophiles) is correct because acetaldehyde has an electrophilic carbonyl carbon and can also undergo reactions involving the acidic alpha-hydrogens.
154
Medium
154 of 165
Understanding
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Which of the following on oxidation gives an acid containing two carbon atoms?
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Correct option: A
Ethanol
Option A (Ethanol) is correct because the oxidation of ethanol yields acetaldehyde, which further oxidizes to ethanoic acid (acetic acid), containing two carbon atoms.
155
Medium
155 of 165
Analyzing
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Order of boiling points of following
I) n-Butane II) Acetone III) Propanal
IV) Methoxy ethane V) Propan-1-ol
I) n-Butane II) Acetone III) Propanal
IV) Methoxy ethane V) Propan-1-ol
View answer and explanation
Correct option: B
I < IV < III < II < V
The correct answer is B (I < IV < III < II < V) because boiling points increase with increasing molecular weight and strength of intermolecular forces, with alcohols having the highest due to hydrogen bonding.
156
Medium
156 of 165
Application
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0.759 g of a silver salt of a dibasic organic acid on ignition left 0.463 g metallic silver. The equivalent weight of acid is:
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Correct option: A
70
Option A (70) is correct because the equivalent weight of the acid is calculated using the equivalent weights of the silver salt and silver.
157
Medium
157 of 165
Understanding
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In the above sequence can be :
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Correct option: B
Option B () is correct because is a selective reducing agent that reduces aldehydes to primary alcohols without affecting carbon-carbon double bonds.
158
Medium
158 of 165
Remembering
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The reverse of esterification is known as:
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Correct option: C
Hydrolysis
Option C (Hydrolysis) is correct because hydrolysis is the reverse reaction of esterification, where an ester reacts with water to form a carboxylic acid and an alcohol.
159
Medium
159 of 165
Remembering
+4 | -1
Silver mirror test is given by which one of the
following compounds?
following compounds?
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Correct option: A
Acetaldehyde
Option A (Acetaldehyde) is correct because aldehydes give a positive silver mirror test.
160
Medium
160 of 165
Understanding
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Given below are two statements:
Statement I: The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.
Statement II: Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.
Choose the most appropriate option:
Statement I: The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.
Statement II: Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.
Choose the most appropriate option:
View answer and explanation
Correct option: A
Both Statement I and Statement II are correct
Both Statement I and Statement II are correct. Esterification is indeed a nucleophilic acyl substitution, and electron-withdrawing groups increase the rate of esterification by stabilizing the transition state.
161
Medium
161 of 165
Remembering
+4 | -1
In the reaction, is
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Correct option: C
urotropine
Option C (urotropine) is correct because formaldehyde reacts with ammonia to form hexamethylenetetramine, also known as urotropine.
162
Medium
162 of 165
Understanding
+4 | -1
Which of the following statement is correct?
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Correct option: C
Boiling points of acids are higher than corresponding alcohols.
Option C (Boiling points of acids are higher than corresponding alcohols) is correct because carboxylic acids form stronger hydrogen bonds than alcohols, leading to higher boiling points.
163
Medium
163 of 165
Analyzing
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Which of the following aldehydes on chlorination will give a product, which can be used for the synthesis of DDT?
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Correct option: B
Option B is correct because chlorination of acetaldehyde yields chloral, which is used in the synthesis of DDT.
164
Medium
164 of 165
Analyzing
+4 | -1
Which is the incorrect order of increasing acidic strength for the following?
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Correct option: D
Option D (HCOOH < C6H5COOH) is the incorrect order because benzoic acid is more acidic than formic acid due to resonance stabilization of the benzoate ion.
165
Medium
165 of 165
Application
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Propanoic acid on warming with in presence of red P gives:
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Correct option: C
Option A () is correct because the number of Einstein units is calculated by dividing the number of photons by Avogadro's number.
Revision notes and key takeaways
Review ALDEHYDES & KETONES & CARBOXYLIC ACIDS in your textbook or class notes, then use this set to check your understanding.
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