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Question (11)

QN004952

A farmer has a mixture of wheat grains and husk. Which property makes winnowing possible?

(A) Difference in colour
(B) Difference in taste
(C) Difference in weight
(D) Difference in shape only

Correct Answer: C

Explanation:

Husk is lighter than grains.

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Question (12)

QN004953

A sieve with very large holes is used to separate flour from bran. What is most likely to happen?

(A) Only flour will pass through
(B) Only bran will pass through
(C) Both may pass through
(D) Neither will pass through

Correct Answer: C

Explanation:

Large holes allow both types of particles to pass.

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Question (13)

QN004954

Which mixture is best separated by handpicking?

(A) Salt and water
(B) Rice and stones
(C) Tea and tea leaves
(D) Oil and water

Correct Answer: B

Explanation:

Stones can be picked manually from rice.

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Question (14)

QN004955

A student rubs roasted peanuts between the palms and then blows air over them. The peanut skins move away because they are:

(A) Magnetic
(B) Soluble
(C) Lighter
(D) Larger

Correct Answer: C

Explanation:

Lighter skins are blown away by air.

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Question (15)

QN004956

Why does husk fall farther away than grains during winnowing?

(A) Husk is heavier
(B) Husk is lighter and gets blown away
(C) Husk dissolves in air
(D) Husk is magnetic

Correct Answer: B

Explanation:

Wind carries away the lighter husk.

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Question (16)

QN004957

A flour mill worker wants fine flour and not bran. Which method should be used?

(A) Sedimentation
(B) Sieving
(C) Filtration
(D) Churning

Correct Answer: B

Explanation:

Sieving separates bran from fine flour.

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Question (17)

QN004958

Salt is obtained from seawater mainly because:

(A) Salt evaporates first
(B) Water evaporates leaving salt behind
(C) Salt settles at the bottom
(D) Salt becomes magnetic

Correct Answer: B

Explanation:

Water evaporates while salt remains.

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Question (18)

QN004959

White patches often appear on dark clothes after sweating in summer. These patches are mainly due to:

(A) Mud
(B) Dust
(C) Salt left after evaporation of water
(D) Oil

Correct Answer: C

Explanation:

Sweat water evaporates and leaves salt behind.

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Question (19)

QN004960

Which method would be most suitable to separate sand from water?

(A) Churning
(B) Winnowing
(C) Filtration
(D) Threshing

Correct Answer: C

Explanation:

Sand is an insoluble solid and can be filtered.

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Question (20)

QN004961

A student leaves muddy water undisturbed for some time. What will happen first?

(A) Water evaporates completely
(B) Mud settles at the bottom
(C) Mud dissolves
(D) Water becomes butter

Correct Answer: B

Explanation:

Heavier mud particles settle down due to sedimentation.

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Question (11)

A farmer has a mixture of wheat grains and husk. Which property makes winnowing possible?

Explanation:

Link:

Question (12)

A sieve with very large holes is used to separate flour from bran. What is most likely to happen?

Explanation:

Link:

Question (13)

Which mixture is best separated by handpicking?

Explanation:

Link:

Question (14)

A student rubs roasted peanuts between the palms and then blows air over them. The peanut skins move away because they are:

Explanation:

Link:

Question (15)

Why does husk fall farther away than grains during winnowing?

Explanation:

Link:

Question (16)

A flour mill worker wants fine flour and not bran. Which method should be used?

Explanation:

Link:

Question (17)

Salt is obtained from seawater mainly because:

Explanation:

Link:

Question (18)

White patches often appear on dark clothes after sweating in summer. These patches are mainly due to:

Explanation:

Link:

Question (19)

Which method would be most suitable to separate sand from water?

Explanation:

Link:

Question (20)

A student leaves muddy water undisturbed for some time. What will happen first?

Explanation:

Link:

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