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CBSE - Class 12 Chemistry Aldehydes Worksheet

1.

Complete each synthesis by giving missing starting material, reagent or products.

2.
Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.
(iv) Excess ethanol and acid
3.
How will you bring about the following conversions in not more than two steps?
(ix) Benzoic acid to \(m\)- Nitrobenzyl alcohol
4.
Draw the structures of the following compounds.
(vi) 3-Bromo-4-phenylpentanoic acid
5.
What is meant by the following terms ? Give an example of the reaction in each case.
(v) Hemiacetal
6.
Give simple chemical tests to distinguish between the following pairs of compounds.
(iii) Phenol and Benzoic acid
7.

Complete each synthesis by giving missing starting material, reagent or products.

8.
Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction.
(iii) Benzaldehyde
9.

Complete each synthesis by giving missing starting material, reagent or products.

10.

Write the IUPAC names of the following ketones and aldehydes. Wherever possible, give also common names.

(v) 

11.
Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.
(v) Zinc amalgam and dilute hydrochloric acid
12.
How will you prepare the following compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom
(iii) p-Nitrobenzoic acid
13.
Describe the following:
(i) Acetylation
14.
What is meant by the following terms ? Give an example of the reaction in each case.
(iv) Aldol
15.
Name the following compounds according to IUPAC system of nomenclature:
(vi) \((CH_{3})_{3}CCH_{2}COOH\)
16.
Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction.
(ii) 2-Methylpentanal
17.
Draw the structures of the following compounds.
(vii) p,p’-Dihydroxybenzophenone
18.
Draw structures of the following derivatives.
(iv) The semicarbazone of cyclobutanone
19.
Draw the structures of the following compounds.
(ii) p-Nitropropiophenone
20.
How will you bring about the following conversions in not more than two steps?
(vi) Bromobenzene to 1-Phenylethanol

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