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SCIENCE PRACTICE QUESTIONS

DIFFUSION & OSMOSIS

1.

An example of a non-living tissue used in osmosis experiment is

A.

cellophane

B.

filter paper

C.

potato

D.

polythene

2.

Cockroaches in a cupboard were killed after an insecticide had been sprayed. The insecticide reached the cockroaches by the process of

A.

osmosis.

B.

absorption.

C.

diffusion.

D.

radiation.

3.

An example of the process of osmosis is

A.

Selective reabsorption

B.

Absorption of digested food

C.

The spread of petrol scent

D.

Gaseous exchange in living things

4.

Dissolved mineral salts from the soil enter the plant by the process of

A.

phototropism

B.

transpiration

C.

diffusion

D.

osmosis

E.
ingestion

5.

The scent of a perfume sprayed at one corner of a room fills the entire room through

A.

conduction.

B.

diffusion.

C.

osmosis.

D.

radiation.

6.

Oxygen from the air is able to get into the blood by

A.

capillarity.

B.

diffusion.

C.

osmosis.

D.

suction.

7.

Movement of the particles of a gas from a region of higher concentration to a region of lower concentration is known as

A.

capillarity.

B.

diffusion.

C.

osmosis.

D.

viscosity.

8.

An example of a non-living tissue used in osmosis experiment is

A.

cellophane

B.

filter paper

C.

potato

D.

polythene

9.

Which of the following statements about diffusion is/are correct?

I. It involves the movement of water molecules only

II. It occurs in both gases and liquids

III. It involves a semi-permeable membrane

A.

I only

B.

II only

C.

I and II only

D.

I, II and III

10.

Which of the following processes is an example of osmosis?

A.

Spreading of perfume in a room.

B.

Absorption of food nutrients into the small intestines.

C.

Spreading of potassium permanganate in water.

D.

Absorption of water into the root hairs.

11.

Kidneys absorbs water from the blood stream of humans through the processes of

A.

diffusion.

B.

egestion.

C.

osmosis.

D.

assimilation.

12.

Absorption of water by plant roots is an example of ......

A.

transpiration

B.

guttation

C.

osmosis

D.

diffusion

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