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Question (21)

QN006582

Which method helps obtain pure water from salt solution?

(A) Evaporation
(B) Filtration
(C) Distillation
(D) Sedimentation

Correct Answer: C

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Question (22)

QN006583

A student heats copper sulfate solution and obtains blue crystals after cooling. The method used is:

(A) Sublimation
(B) Crystallization
(C) Distillation
(D) Filtration

Correct Answer: B

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Question (23)

QN006584

Which of the following is NOT a method for separating homogeneous mixtures?

(A) Distillation
(B) Crystallization
(C) Paper chromatography
(D) Handpicking

Correct Answer: D

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Question (24)

QN006585

In crystallization, impurities remain mostly in the:

(A) Crystals
(B) Vapours
(C) Mother liquor
(D) Condenser

Correct Answer: C

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Question (25)

QN006586

A mixture of ink dyes can be separated by:

(A) Filtration
(B) Paper chromatography
(C) Sedimentation
(D) Sublimation

Correct Answer: B

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Question (26)

QN006587

The apparatus used to cool vapours in distillation is called:

(A) Burner
(B) Evaporating dish
(C) Condenser
(D) Watch glass

Correct Answer: C

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Question (27)

QN006588

In distillation, the liquid collected after condensation is known as:

(A) Residue
(B) Distillate
(C) Filtrate
(D) Precipitate

Correct Answer: B

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Question (28)

QN006589

Which process depends mainly on differences in solubility with temperature?

(A) Distillation
(B) Crystallization
(C) Sublimation
(D) Filtration

Correct Answer: B

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Question (29)

QN006590

A student wants to separate pigments from flower extract. Which method should be used?

(A) Filtration
(B) Sedimentation
(C) Chromatography
(D) Distillation

Correct Answer: C

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Question (30)

QN006591

Which separation method is most useful in petroleum refineries?

(A) Crystallization
(B) Fractional distillation
(C) Sublimation
(D) Sedimentation

Correct Answer: B

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Question (21)

Which method helps obtain pure water from salt solution?

Explanation:

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Question (22)

A student heats copper sulfate solution and obtains blue crystals after cooling. The method used is:

Explanation:

Link:

Question (23)

Which of the following is NOT a method for separating homogeneous mixtures?

Explanation:

Link:

Question (24)

In crystallization, impurities remain mostly in the:

Explanation:

Link:

Question (25)

A mixture of ink dyes can be separated by:

Explanation:

Link:

Question (26)

The apparatus used to cool vapours in distillation is called:

Explanation:

Link:

Question (27)

In distillation, the liquid collected after condensation is known as:

Explanation:

Link:

Question (28)

Which process depends mainly on differences in solubility with temperature?

Explanation:

Link:

Question (29)

A student wants to separate pigments from flower extract. Which method should be used?

Explanation:

Link:

Question (30)

Which separation method is most useful in petroleum refineries?

Explanation:

Link:

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