Class 12 Chemistry ISC Aldehydes and Ketones Board Questions
Here we provide Class 12 chemistry important notes,board questions and predicted questions with Answers for chapter Aldehydes and Ketones. These important notes,board questions and predicted questions are based on ISC board curriculum and correspond to the most recent Class 12 chemistry syllabus. By practising these Class 12 materials, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 12 Board examinations as well as other entrance exams such as NEET and JEE.
2020
Q1
How will you convert the following :(Given balanced equation)
(i) Benzoyl chloride to benzaldehyde.
(ii) Methyl chloride to acetic acid.
(iii) Acetic acid to methane
solutions
(i) Benzoyl chloride to benzaldehyde.
(ii) Methyl chloride to acetic acid.
(iii) Acetic acid to methane
solutions
OR
Q1
A ketone A (C4H8O) which undergoes Iodoform reaction gives compound B on
reduction.B on heating with conc. H2SO4 at 443K gives a compound C which forms
ozonide D.D on hydrolysis with Zn dust gives only E.Identify the compound A to E.Write the Iodoform
reaction with compound A
solutions
solutions
2019
Q1
(a) (i) Give balanced chemical equations for the following reactions:
(1) Acetaldehyde reacts with hydrogen cyanide
(2) Acetone reacts with phenyl hydrazine
(3) Acetic acid is treated with ethanol and a drop of conc. H2SO4
(ii) Give one chemical test each to distinguish between the following pairs of compounds:
(1) Acetone and benzaldehyde
(2) Phenol and benzoic acid
solutions
(1) Acetaldehyde reacts with hydrogen cyanide
(2) Acetone reacts with phenyl hydrazine
(3) Acetic acid is treated with ethanol and a drop of conc. H2SO4
(ii) Give one chemical test each to distinguish between the following pairs of compounds:
(1) Acetone and benzaldehyde
(2) Phenol and benzoic acid
solutions
OR
Q1
(i) Write chemical equations to illustrate the following name reactions:
(1) Aldol condensation
(2) Cannizarro's reaction
(3) Benzoin condensation
(ii) Identify the compounds A and B in the given reactions:
solutions
(1) Aldol condensation
(2) Cannizarro's reaction
(3) Benzoin condensation
(ii) Identify the compounds A and B in the given reactions:
solutions
2018
Q1
(i) Give balanced equations for the following reactions:
(1) benzaldehyde reacts with hydrazine
(2) Acetic acid reacts with phosphorous pentachloride
(3) Acetone reacts with sodium bisulphite
(ii) Give one chemical test each to distinguish between the following pairs of compounds:
(1) Ethanol and acetic acid
(2) Acetaldehyde and benzaldehyde
solutions
(1) benzaldehyde reacts with hydrazine
(2) Acetic acid reacts with phosphorous pentachloride
(3) Acetone reacts with sodium bisulphite
(ii) Give one chemical test each to distinguish between the following pairs of compounds:
(1) Ethanol and acetic acid
(2) Acetaldehyde and benzaldehyde
solutions
OR
Q1
Write chemical equations to illustrate the following name reactions:
(1) Clemmensen's reduction
(2) Rosenmund's reduction
(3) HVZ reaction
solutions
(1) Clemmensen's reduction
(2) Rosenmund's reduction
(3) HVZ reaction
solutions
2017
Q1
Give balanced equations for the following name reactions:
Aldol condensation
solutions
Aldol condensation
solutions
Q2
Identify the compounds A,B and C:
solutions
solutions
2016
Q1
(a) Give balanced equations for the following name reactions:
(i) Benzoin condensation
(b) Give chemical test to distinguish
(i) Formaldehyde and Acetaldehyde
(c)(ii) Starting with Grignard's reagent,how will you prepare popanoic acid
solutions
(i) Benzoin condensation
(b) Give chemical test to distinguish
(i) Formaldehyde and Acetaldehyde
(c)(ii) Starting with Grignard's reagent,how will you prepare popanoic acid
solutions
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