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Question (31)

QN002701

A cook mixes lemon juice, salt, sugar, and water thoroughly. No separate component is visible. The drink prepared is

(A) non-uniform mixture
(B) pure substance
(C) uniform mixture
(D) compound

Correct Answer: C

Explanation:

All components are evenly distributed.

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Question (32)

QN002702

Which of the following is NOT a mixture?

(A) Air
(B) Soda water
(C) Vinegar
(D) Oxygen gas

Correct Answer: D

Explanation:

Oxygen gas is a pure substance.

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Question (33)

QN002703

In science, components of a mixture must be

(A) living substances only
(B) pure substances only
(C) liquids only
(D) solids only

Correct Answer: B

Explanation:

Scientific mixtures are formed from pure substances.

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Question (34)

QN002704

A student mixes sand and iron filings. Which method can separate the mixture easily?

(A) Evaporation
(B) Filtration
(C) Magnet
(D) Sedimentation only

Correct Answer: C

Explanation:

Iron filings are attracted by a magnet while sand is not.

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Question (35)

QN002705

Which of the following is an example of a solid-solid mixture?

(A) Air
(B) Alloy
(C) Soda water
(D) Vinegar

Correct Answer: B

Explanation:

Alloys are mixtures of solids.

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Question (36)

QN002706

If air did not contain water vapour, which observation would MOST likely not occur?

(A) Rusting of iron
(B) Formation of dew droplets
(C) Burning of candle
(D) Presence of nitrogen

Correct Answer: B

Explanation:

Dew forms due to condensation of water vapour.

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Question (37)

QN002707

Which statement correctly explains why sugar solution is a uniform mixture?

(A) Sugar reacts chemically with water
(B) Sugar particles settle down
(C) Sugar particles spread evenly throughout water
(D) Sugar becomes invisible permanently

Correct Answer: C

Explanation:

Uniform distribution makes it a uniform mixture.

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Question (38)

QN002708

A mixture contains two liquids. After mixing, two separate layers are formed. The mixture is most likely

(A) uniform
(B) pure
(C) non-uniform
(D) an alloy

Correct Answer: C

Explanation:

Separate layers indicate non-uniformity.

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Question (39)

QN002709

Which of the following mixtures is MOST likely to have the same composition throughout?

(A) Vegetable salad
(B) Muddy water
(C) Air
(D) Mixture of nuts

Correct Answer: C

Explanation:

Air is a uniform mixture of gases.

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Question (40)

QN002710

Ancient Indian texts mentioned the medicinal use of bronze, which is made from copper and tin in the ratio

(A) 1 : 4
(B) 2 : 1
(C) 4 : 1
(D) 3 : 2

Correct Answer: C

Explanation:

Bronze contains 4 parts copper and 1 part tin.

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Question (31)

A cook mixes lemon juice, salt, sugar, and water thoroughly. No separate component is visible. The drink prepared is

Explanation:

Link:

Question (32)

Which of the following is NOT a mixture?

Explanation:

Link:

Question (33)

In science, components of a mixture must be

Explanation:

Link:

Question (34)

A student mixes sand and iron filings. Which method can separate the mixture easily?

Explanation:

Link:

Question (35)

Which of the following is an example of a solid-solid mixture?

Explanation:

Link:

Question (36)

If air did not contain water vapour, which observation would MOST likely not occur?

Explanation:

Link:

Question (37)

Which statement correctly explains why sugar solution is a uniform mixture?

Explanation:

Link:

Question (38)

A mixture contains two liquids. After mixing, two separate layers are formed. The mixture is most likely

Explanation:

Link:

Question (39)

Which of the following mixtures is MOST likely to have the same composition throughout?

Explanation:

Link:

Question (40)

Ancient Indian texts mentioned the medicinal use of bronze, which is made from copper and tin in the ratio

Explanation:

Link:

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