Question

Q1) Choose the correct alternatives.

1] Milk is an example of type of matter called

a) solution

c) heterogeneous

2] The electron shell

a) L b) M

b) homogeneous mixture d) suspension

is nearest to the nucleus.

d) N

Marks : 30 Time: Hr.

5

C) K

3) Which of the following instrument records the intensity of earthquake?

a) Lactometer b) Hygrometer

c) Thermometer

d) Seismometer

4] The natural cause of air pollution is

a) burning of fuels b) industrialization

c) forest fire

d) atomic energy plants

5] Which of the following metals has antibacterial property?

a) Platinum

c) Silver

b) Gold

d) Palladium

Q2) Answer the following questions (Any 3)

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1) What is meant by subatomic particle? Give brief information. Of three subatomic particles with reference to electrical charge, mass and

location.

2] What are the adverse effect of corrosion?

3] Suggest four preventive measures for air pollution. 4) Effects of landslide.

5] Describe the construction and working of an electric bell with the help

of diagram Q3A) Match the pairs.

A Group

1] Sulphur dioxide

2

B

Group

a) Mental retardness

2] Water containing cobalt b) Inflammation of lungs

3] Nitrog dioxide

c) Irritation of eyes

4) Water containing lead d) Paralysis B) Give two examples of each. 1] Colloid

2] Complex compound​

Answer 1

Answer:

option A please follow me