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Question (11)

QN004992

A beaker contains water mixed with clay. After 30 minutes, a layer forms at the bottom. This layer is called:

(A) Filtrate
(B) Residue
(C) Sediment
(D) Vapour

Correct Answer: C

Explanation:

Settled particles form sediment.

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Question (12)

QN004993

Which property mainly helps sedimentation occur?

(A) Difference in colour
(B) Difference in particle weight
(C) Difference in smell
(D) Difference in taste

Correct Answer: B

Explanation:

Heavier particles settle faster.

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Question (13)

QN004994

A student immediately pours muddy water after mixing it. Why will decantation not work properly?

(A) Water is too clear
(B) Sedimentation has not occurred
(C) Mud has dissolved
(D) Air is absent

Correct Answer: B

Explanation:

The particles must settle before decantation.

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Question (14)

QN004995

Which statement about sedimentation is correct?

(A) It separates dissolved substances
(B) It separates lighter gases
(C) It separates heavier insoluble particles from liquids
(D) It separates magnetic materials

Correct Answer: C

Explanation:

Sedimentation works with insoluble particles.

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Question (15)

QN004996

If 500 mL of muddy water is left undisturbed and 80 mL of mud settles, approximately how much clearer water remains above the sediment?

(A) 80 mL
(B) 420 mL
(C) 500 mL
(D) 580 mL

Correct Answer: B

Explanation:

500 − 80 = 420 mL.

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Question (16)

QN004997

Which process directly removes the clear liquid after sedimentation?

(A) Churning
(B) Sieving
(C) Decantation
(D) Winnowing

Correct Answer: C

Explanation:

Decantation removes the upper liquid layer.

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Question (17)

QN004998

A child accidentally shakes a vessel after sedimentation. What will most likely happen?

(A) Sediment will mix again with water
(B) Water will evaporate
(C) Sediment will dissolve
(D) Water will freeze

Correct Answer: A

Explanation:

Shaking redistributes the settled particles.

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Question (18)

QN004999

In which situation is decantation preferred over filtration?

(A) When dissolved salt is present
(B) When large settled particles are present
(C) When gases are mixed
(D) When magnetic substances are present

Correct Answer: B

Explanation:

Large settled particles can be separated easily by decantation.

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Question (19)

QN005000

A mixture contains water and small stones. Which method should be used first?

(A) Sedimentation
(B) Evaporation
(C) Churning
(D) Magnetic separation

Correct Answer: A

Explanation:

Stones settle quickly due to sedimentation.

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Question (20)

QN005001

Which statement correctly describes decantation?

(A) It settles particles at the bottom
(B) It uses a filter paper
(C) It separates the upper liquid from settled solids
(D) It removes dissolved substances

Correct Answer: C

Explanation:

Decantation separates liquid from sediment.

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Question (11)

A beaker contains water mixed with clay. After 30 minutes, a layer forms at the bottom. This layer is called:

Explanation:

Link:

Question (12)

Which property mainly helps sedimentation occur?

Explanation:

Link:

Question (13)

A student immediately pours muddy water after mixing it. Why will decantation not work properly?

Explanation:

Link:

Question (14)

Which statement about sedimentation is correct?

Explanation:

Link:

Question (15)

If 500 mL of muddy water is left undisturbed and 80 mL of mud settles, approximately how much clearer water remains above the sediment?

Explanation:

Link:

Question (16)

Which process directly removes the clear liquid after sedimentation?

Explanation:

Link:

Question (17)

A child accidentally shakes a vessel after sedimentation. What will most likely happen?

Explanation:

Link:

Question (18)

In which situation is decantation preferred over filtration?

Explanation:

Link:

Question (19)

A mixture contains water and small stones. Which method should be used first?

Explanation:

Link:

Question (20)

Which statement correctly describes decantation?

Explanation:

Link:

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