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Question (41)

QN006502

The Tyndall effect is:

(A) Formation of crystals
(B) Settling of particles
(C) Scattering of light by particles
(D) Boiling of liquids

Correct Answer: C

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Question (42)

QN006503

Which mixture will definitely show Tyndall effect?

(A) Sugar solution
(B) Copper sulfate solution
(C) Milk and water
(D) Salt solution

Correct Answer: C

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Question (43)

QN006504

The path of light becomes visible in a dark room because of scattering by:

(A) Oxygen only
(B) Nitrogen only
(C) Dust and smoke particles
(D) Water vapour only

Correct Answer: C

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Question (44)

QN006505

Which of the following is an oil-in-water emulsion?

(A) Butter
(B) Cold cream
(C) Milk
(D) Body lotion

Correct Answer: C

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Question (45)

QN006506

Which mixture is most likely to appear hazy due to Tyndall effect?

(A) Distilled water
(B) Salt solution
(C) Smoke in air
(D) Sugar crystals

Correct Answer: C

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Question (46)

QN006507

18 g salt is dissolved in 162 g water. The concentration in % m/m is:

(A) 5%
(B) 8%
(C) 10%
(D) 18%

Correct Answer: C

Explanation:

Total mass = 180 g; (18/180) × 100

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Question (47)

QN006508

A student mixes 12 mL perfume essence to prepare 300 mL perfume solution. The concentration is:

(A) 2% v/v
(B) 3% v/v
(C) 4% v/v
(D) 6% v/v

Correct Answer: C

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Question (48)

QN006509

6 g glucose is dissolved to prepare 150 mL solution. Find % m/v.

(A) 2%
(B) 3%
(C) 4%
(D) 5%

Correct Answer: C

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Question (49)

QN006510

A 250 g spice mixture contains 20 g salt. The salt concentration by mass is:

(A) 4%
(B) 6%
(C) 8%
(D) 10%

Correct Answer: C

Explanation:

(20/250) × 100

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Question (50)

QN006511

A saturated solution of compound B contains 287 g solute in 100 g water at 60°C. At 40°C, only 241 g remains dissolved. The mass of crystals formed is:

(A) 36 g
(B) 40 g
(C) 46 g
(D) 52 g

Correct Answer: C

Explanation:

287 – 241 = 46 g

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Question (41)

The Tyndall effect is:

Explanation:

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Question (42)

Which mixture will definitely show Tyndall effect?

Explanation:

Link:

Question (43)

The path of light becomes visible in a dark room because of scattering by:

Explanation:

Link:

Question (44)

Which of the following is an oil-in-water emulsion?

Explanation:

Link:

Question (45)

Which mixture is most likely to appear hazy due to Tyndall effect?

Explanation:

Link:

Question (46)

18 g salt is dissolved in 162 g water. The concentration in % m/m is:

Explanation:

Link:

Question (47)

A student mixes 12 mL perfume essence to prepare 300 mL perfume solution. The concentration is:

Explanation:

Link:

Question (48)

6 g glucose is dissolved to prepare 150 mL solution. Find % m/v.

Explanation:

Link:

Question (49)

A 250 g spice mixture contains 20 g salt. The salt concentration by mass is:

Explanation:

Link:

Question (50)

A saturated solution of compound B contains 287 g solute in 100 g water at 60°C. At 40°C, only 241 g remains dissolved. The mass of crystals formed is:

Explanation:

Link:

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