NSO Level 1- Science Olympiad (SOF) Class 8: Questions 581 - 584 of 1175

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Question 581

Question

MCQ▾

Viper is called an ovoviviparous. The reason is

Choices

Choice (4)Response

a.

It lays eggs as well as give birth to young ones.

b.

It incubates the eggs inside the body and give birth to young ones.

c.

We are not sure whether it is an oviparous or a viviparous.

d.

All of the above

Question 582

Question

MCQ▾

Which of the following is used as a fire extinguisher?

Choices

Choice (4)Response

a.

Carbon dioxide

b.

Oxygen

c.

Water

d.

Both a. and c. are correct

Question 583

Question

MCQ▾

Increased concentration of this gas in atmosphere may cause global warming.

Choices

Choice (4)Response

a.

Nitric oxide

b.

Carbon dioxide

c.

Sulphur dioxide

d.

None of the above

Question 584

Question

MCQ▾

Diya was doing some experiments. The steps of procedure are given here.

i) took two test tubes, marked them as A and B.

ii) Put small pieces of copper wire in both the test tubes.

iii) added 4 to 5 drops of dilute hydrochloric acid in test tube A and dilute sulphuric acid in test tube B.

iv) Brought a lighted match stick near the mouth of the test tubes She observed that in test tube B, the match stick burnt with a pop sound.

Conclusion of this experiment would be

Choices

Choice (4)Response

a.

Copper reacts with sulphuric acid releasing hydrogen gas

b.

Copper reacts with hydrochloric acid releasing hydrogen gas

c.

Copper reacts with sulphuric acid releasing oxygen gas

d.

Copper reacts with hydrochloric acid releasing oxygen gas

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