Chapter 13: Amines

NCERT Solutions for CBSE Class 10 Chemistry — 11 solved questions with detailed explanations.

Questions

Topics

Solved Questions

Q1. Carbylamine test is used to detect:

Primary amines
Secondary amines
Tertiary amines
All amines

Difficulty: Easy-Medium · Topic: Tests

Solution

Carbylamine (isocyanide) test: RNH₂ + CHCl₃ + 3KOH → RNC + 3KCl + 3H₂O. Only primary amines give foul-smelling isocyanide.

Q2. Gabriel phthalimide synthesis gives:

Primary amines
Secondary amines
Tertiary amines
Aromatic amines

Difficulty: Easy-Medium · Topic: Synthesis

Solution

Gabriel synthesis produces pure primary amines from phthalimide + alkyl halide + hydrazine.

Q3. Hinsberg test distinguishes:

1°, 2°, 3° amines
acids from bases
alcohols from phenols
aldehydes from ketones

Difficulty: Easy-Medium · Topic: Amines

Solution

1°, 2°, 3° amines.

Q4. Diazonium salts are stable only at:

100°C
room temperature
0-5°C
at any temperature

Difficulty: Easy-Medium · Topic: Amines

Solution

0-5°C.

Q5. Sandmeyer reaction replaces:

OH with NH₂
H with halogen
N₂⁺ with Cl, Br, or CN
NH₂ with OH

Difficulty: Easy-Medium · Topic: Amines

Solution

N₂⁺ with Cl, Br, or CN.

Q6. Tollens' test (silver mirror) is used to detect:

Ketones
Alcohols
Aldehydes
Amines

Difficulty: Easy-Medium · Topic: Chemical Tests

Solution

Tollens' test (silver mirror) detects Aldehydes.

Q7. Fehling's test (red precipitate) is used to detect:

Acids
Aliphatic aldehydes
Aromatic aldehydes
Ketones

Difficulty: Easy-Medium · Topic: Chemical Tests

Solution

Fehling's test (red precipitate) detects Aliphatic aldehydes.

Q8. Iodoform test is used to detect:

All alcohols
All aldehydes
Methyl ketones/ethanol
All acids

Difficulty: Easy-Medium · Topic: Chemical Tests

Solution

Iodoform test detects Methyl ketones/ethanol.

Q9. IUPAC name of CH₃NH₂:

Ethanamine
Propanamine
Methanamine
Aniline

Difficulty: Easy-Medium · Topic: IUPAC

Solution

CH₃NH₂ = Methanamine.

Q10. IUPAC name of C₆H₅OH:

Aniline
Phenol
Toluene
Benzene

Difficulty: Easy-Medium · Topic: IUPAC

Solution

C₆H₅OH = Phenol.

Q11. The basic strength order of amines in aqueous solution is:

1° > 2° > 3°
2° > 1° > 3°
3° > 2° > 1°
2° > 3° > 1°

Difficulty: Medium · Topic: Basicity

Solution

In aqueous solution: 2° > 1° > 3° for aliphatic amines (balance of induction, solvation, and steric effects).

Other Chapters in Chemistry

Ch 1: Solid State Ch 2: Solutions Ch 3: Electrochemistry Ch 4: Chemical Kinetics Ch 5: Surface Chemistry Ch 6: Isolation of Elements Ch 7: p-Block Elements Ch 8: d & f Block Elements Ch 9: Coordination Compounds Ch 10: Haloalkanes & Haloarenes Ch 11: Alcohols Phenols Ethers Ch 12: Aldehydes Ketones Ch 14: Biomolecules Ch 15: Polymers Ch 16: Chemistry in Everyday Life

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