NSO Level 1- Science Olympiad (SOF) Class 8: Questions 726 - 729 of 1178

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Question 726

Question MCQ▾

Diya was doing experiment. The steps of procedure are given here.

i) She took a test tube and put small pieces of copper wire in it.

ii) Added 4 to 5 drops of dilute sulphuric acid in test tube.

iii) Brought a lighted match stick near the mouth of the test tubes

She observed that the match stick burnt with a pop sound. What does the pop sound indicate?

Choices

Choice (4)Response

a.

A gas which extinguish the fire is produced due to the chemical reaction.

b.

A gas which helps in combustion is produced due to chemical reaction.

c.

A highly inflammable gas is produced due to the chemical reaction

d.

Question does not provide sufficient data or is vague

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Question 727

Question MCQ▾

Hydrogen is a highly inflammable gas. The product formed when hydrogen burns in air is

Choices

Choice (4)Response

a.

Hydrogen peroxide

b.

Hydroxide

c.

Water

d.

All of the above

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Question 728

Question MCQ▾

Which of the following is not an example of an oviparous animal?

Choices

Choice (4)Response

a.

Frog

b.

Crocodile

c.

Duck

d.

Blue whale

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Question 729

Question MCQ▾

Frictional force is applied in the direction of

Choices

Choice (4)Response

a.

Opposite to the object

b.

The object

c.

Downwards

d.

None of the above

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