The process of separating ammonium chloride from a mixture of ammonium chloride and salt uses: MCQ with Answer and Explanation

The process of separating ammonium chloride from a mixture of ammonium chloride and salt uses:
A. Distillation
B. Evaporation
C. Sublimation
D. Filtration
Answer: Option C
Solution (By JKExamLibrary)
Ammonium chloride sublimes on heating; it converts directly from solid to vapor, leaving behind common salt. The vapors can be condensed on a cold surface to obtain solid NH₄Cl. This method works for any mixture where one component sublimes and the other does not.

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Practice More chemistry Questions

Question #1
Which of the following molecules has a linear shape?
A. NH₃
B. CH₄
C. CO₂
D. H₂O

Correct Answer: Option C


Explanation:
CO₂ has sp hybridized carbon, forming two double bonds with oxygen in a linear arrangement (O=C=O) with bond angle 180°. H₂O is bent (angular, 104.5°), NH₃ is trigonal pyramidal (107°), CH₄ is tetrahedral (109.5°). Molecular shape is determined by VSEPR theory: CO₂ has 2 bond pairs, 0 lone pairs → linear.

This question belongs to: Science chemistry
Question #2
In the reaction Fe₂O₃ + 2Al → Al₂O₃ + 2Fe, which element is oxidized?
A. None
B. Fe
C. Al
D. O

Correct Answer: Option C


Explanation:
Aluminium goes from 0 to +3 oxidation state (Al → Al³⁺ + 3e⁻), so it is oxidized. Iron goes from +3 to 0 (Fe³⁺ + 3e⁻ → Fe), reduced. This is a thermite reaction, highly exothermic, used for welding. Al is the reducing agent, Fe₂O₃ is the oxidizing agent. Oxidation is loss of electrons.

This question belongs to: Science chemistry
Question #3
Gamma rays have the highest penetration power because they:
A. Have no mass and no charge
B. Carry positive charge
C. Are heaviest
D. Are slowest

Correct Answer: Option A


Explanation:
Gamma rays are electromagnetic waves with no rest mass and no charge, so they do not readily interact with matter via ionization compared to alpha and beta particles. They can penetrate deep into materials, requiring dense lead or thick concrete for shielding. Alpha and beta particles interact strongly via charge, losing energy quickly. Gamma rays are similar to X-rays but from nuclear origin.

This question belongs to: Science chemistry