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Published on: 20/08/2026
Download CBSE Class 12th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Chemistry
Questions + Answers key
Take MCQ Chemistry Test

1.
Give the structures and IUPAC names of monohydric phenols of molecular formula C7H8O.
2.
Arrange the following sets of compounds in order of their increasing order of their acid strength:
Propan-1-ol, 2,4,6-trinitrophenol, 3-nitro-phenol, 3,5-dinitrophenol, phenol, 4-methyl-phenol.
3.
Suggest a reagent for the following conversion.

4.
Name the reagents used in the following reactions:
(i) Oxidation of a primary alcohol to carboxylic acid.
(ii) Oxidation of a primary alcohol to an aldehyde.
(iii) Bromination of phenol to 2,4,6-tribromophenol.
(iv) Benzyl alcohol to benzoic acid.
(v) Dehydration of propan-2-ol to propene.
(vi) Butan-2-one to butan-2-ol.
5.
How are the following conversions carried out?
(i) Propene \(\longrightarrow \) Propan-2-ol
(ii) Ethyl magnesium chloride\(\longrightarrow \) Benzyl alcohol
(iii) Ethyl magnesium chloride \(\longrightarrow \) Propan-1-ol.
(iv) Methyl magnesium bromide\(\longrightarrow \) 2-Methylpropan-2-ol.
6.
Write equations of the following reactions:
(i) Friedel-Crafts reaction - alkylation in anisole,
(ii) Nitration of anisole
(iii) Bromination of anisole in ethanoic acid medium,
(iv) Friedel- Crafts acetylation of anisole.
7.
The C-O-C bond angle in the ether molecule is
111°
90°
120°
180°
8.





9.
Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives
nitrobenzene
2,4,6-trinitrobenzene
o-nitrophenol
p-nitrophenol
10.
Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?
(i).(iii) and (iv)
only (ii)
(i), (ii) and (iii)
(i) and (ii)
11.
In the following sequence of reactions, CH3-Br \(\overset{KCN}\longrightarrow\) A \(\overset{H_3O^+}\longrightarrow\) B \(\overset { LiAlH_{ 4 } }{ \underset { ether }{ \longrightarrow } } \) C the end product (c) is
acetone
methane
acetaldehyde
ethyl alcohol
12.
How many alcohols with molecular formula C4H10O are chiral in nature?
1
2
3
4
13.
Assertion: Boiling points of alcohols are higher than ethers.
Reason: They can form intennolecular hydrogen bonding.
Codes:
A) Assertion and reason both are correct and reason is correct explanation of assertion.
B) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
C) Assertion is correct statement but reason is wrong statement.
D) Assertion is wrong statement but reason is correct statement.
14.
15.
In the following questions. an Assertion (A) is followed by a corresponding Reason (R) Use the following keys to choose the appropriate answer.
Assertion (A) Alcohols and phenols are soluble in water.
Reason (R) There occurs a dipole-dipole interaction of OH group of alcohol and phenol with water molecules which is responsible for their solubility in water.
Codes:
(a) Both (A) and (R) are correct, (R) is the correct explanation of (A).
(b) Both (A) and (R) are correct, (R) is not the correct explanation of (A).
(c) (A) is correct; (R) is incorrect.
(d) (A) is incorrect; (R) is correct.
16.
1.
The phenolic compound with molecular formula C7H8O, has tlhree isomers that are as follows,
2.
Propan-1-ol, 4-methylphenol, phenol, 3-nitro-phenol, 3,5-dinitrophenol, 2,4,6-trinitrophenol is increasing order of acid strength.
3.
2° alcohols are oxidised to ketones by chromic anhydride CrO3
without carrying out oxidation of double bond.
4.
(i) Acidified K2Cr2O7 (followed by hydrolysis with dil, H2SO4)
(ii) Pyridinium chlorochromate (PCC)
(iii) Aqueous bromine
(iv) Acidified or alkaline KMnO4 (followed by hydrolysis with dil. H2SO4)
(v) 85% H3PO4 at 440 K
(vi) Ni/H2 or NaBH4 or LiAlH4
5.
(i) If propene is allowed to react with water in the presence of an acid as a catalyst, then propan-2-ol is obtained.
(ii) If benzyl chloride is treated with NaOH (followed by acidification) then benzyl alcohol is produced.
(iii) When ethyl magnesium chloride is treated with methanal, an adduct is the produced which gives propan-1-ol on hydrolysis.
(iv) When methyl magnesium bromide is treated with propane, an adduct is the product which gives 2-methylpropane-2-ol on hydrolysis.
6.
(i)
(ii)
(iii)
(iv)
7.
(a)
111°
8.
(a)

9.
(c)
o-nitrophenol
10.
(c)
(i), (ii) and (iii)
11.
(d)
ethyl alcohol
12.
(a)
1
13.
C) Assertion is correct statement but reason is wrong statement.
Explanation:
Assertion is correct. Correct reason. Intermolecular hydrogen bonding is present in alcohols but not in ethers.
14.
15.
(c) Solubility of alcohols and phenols in water is due to their ability to form hydrogen bonds with water molecules.
The solubility decreases with increase in size of the alkyl/aryl groups. Several lower molecular mass alcohols are miscible with water in all proportions. Hence, (A) is correct but (R) is incorrect.
16.
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