NSO Level 1- Science Olympiad (SOF) Class 8: Questions 666 - 670 of 1175

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Question 666

Question

MCQ▾

Zinc is used as a coating in galvanization of iron. The possible reason is

Choices

Choice (4)Response

a.

Zinc is more reactive than iron.

b.

Zinc coating prevents the direct contact of oxygen and water with iron.

c.

Both a. and b. are correct

d.

None of the above

Question 667

Question

MCQ▾

The factor necessary for combustion is

Choices

Choice (4)Response

a.

Carbon dioxide

b.

Oxygen

c.

Nitrogen

d.

Water

Passage

Observe the picture carefully and answer questions below.

Male Reproductive Organ

Question 668 (1 of 2 Based on Passage)

Question

MCQ▾

The function of the part labelled as Y in the picture is

Choices

Choice (4)Response

a.

To carry the sperm

b.

To eject the sperms

c.

To produce sperms

d.

None of the above

Question 669 (2 of 2 Based on Passage)

Question

MCQ▾

The part labelled as X in the picture is

Choices

Choice (4)Response

a.

Sperm duct

b.

Testes

c.

Sperm

d.

Penis

Question 670

Question

MCQ▾

Reema and her father were riding on a bike. The bike suddenly stopped. Her father tried to restart it several times but he couldn՚t. He checked the vehicle and told her that the petrol tank is empty. The petrol pump was nearly away from there. They hired an auto rickshaw and reached the petrol pump. Her father asked for 1 litre petrol in a plastic bottle. The labourer refused to give him saying that due to security reasons they are not allowed to do so. The reason may be

Choices

Choice (4)Response

a.

It may catch fire in presence of a spark even

b.

Petrol is highly inflammable.

c.

Its ignition temperature is too low

d.

All a., b. and c. are correct

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