Default Title

Question (1)

QN004982

Which process is called sedimentation?

(A) Conversion of liquid into vapour
(B) Settling of heavier insoluble particles at the bottom of a liquid
(C) Separation using a sieve
(D) Removal of husk by wind

Correct Answer: B

Explanation:

Sedimentation is the settling of heavier insoluble particles at the bottom of a liquid.

Link:

Report Error

Question (2)

QN004983

Which process is called decantation?

(A) Settling of particles at the bottom
(B) Separating grains from stalks
(C) Removing the clear liquid by carefully tilting a vessel
(D) Filtering a liquid through cloth

Correct Answer: C

Explanation:

Decantation involves carefully pouring out the clear liquid without disturbing the sediment.

Link:

Report Error

Question (3)

QN004984

In a vessel containing muddy water left undisturbed, what settles at the bottom first?

(A) Water
(B) Air bubbles
(C) Mud particles
(D) Dissolved salt

Correct Answer: C

Explanation:

Heavier mud particles settle at the bottom.

Link:

Report Error

Question (4)

QN004985

Sedimentation is useful only when the solid particles are:

(A) Soluble in water
(B) Insoluble and heavier than the liquid
(C) Magnetic
(D) Smaller than water molecules

Correct Answer: B

Explanation:

Insoluble and heavier particles settle down naturally.

Link:

Report Error

Question (5)

QN004986

Which method follows sedimentation to obtain clearer water?

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

Correct Answer: C

Explanation:

After particles settle, clear water is separated by decantation.

Link:

Report Error

Question (6)

QN004987

A student leaves a mixture of sand and water undisturbed. Which process occurs first?

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

Correct Answer: C

Explanation:

Sand settles first due to sedimentation.

Link:

Report Error

Question (7)

QN004988

Which of the following is an example of decantation in daily life?

(A) Straining tea with a strainer
(B) Pouring off water after washing rice
(C) Separating flour using a sieve
(D) Removing stones from pulses

Correct Answer: B

Explanation:

Water is poured off after heavier particles settle.

Link:

Report Error

Question (8)

QN004989

Why should a vessel remain undisturbed during sedimentation?

(A) To increase evaporation
(B) To allow particles to settle down
(C) To dissolve the particles
(D) To cool the liquid

Correct Answer: B

Explanation:

Disturbance prevents particles from settling.

Link:

Report Error

Question (9)

QN004990

Which mixture can be separated effectively by sedimentation and decantation?

(A) Salt and water
(B) Sugar and water
(C) Mud and water
(D) Milk and water

Correct Answer: C

Explanation:

Mud is insoluble and settles down.

Link:

Report Error

Question (10)

QN004991

During sedimentation, heavier particles move:

(A) Upward
(B) Sideways
(C) Toward the bottom
(D) Into the air

Correct Answer: C

Explanation:

Gravity pulls heavier particles downward.

Link:

Report Error

Question (1)

Which process is called sedimentation?

Explanation:

Link:

Question (2)

Which process is called decantation?

Explanation:

Link:

Question (3)

In a vessel containing muddy water left undisturbed, what settles at the bottom first?

Explanation:

Link:

Question (4)

Sedimentation is useful only when the solid particles are:

Explanation:

Link:

Question (5)

Which method follows sedimentation to obtain clearer water?

Explanation:

Link:

Question (6)

A student leaves a mixture of sand and water undisturbed. Which process occurs first?

Explanation:

Link:

Question (7)

Which of the following is an example of decantation in daily life?

Explanation:

Link:

Question (8)

Why should a vessel remain undisturbed during sedimentation?

Explanation:

Link:

Question (9)

Which mixture can be separated effectively by sedimentation and decantation?

Explanation:

Link:

Question (10)

During sedimentation, heavier particles move:

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY