NSO Level 1- Science Olympiad (SOF) Class 8: Questions 476 - 479 of 1175

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Question 476

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

The observation would be

Choices

Choice (4)Response

a.

In the test tubes A and B, the match stick extinguishes quickly.

b.

In test tube B, the match stick burns with a pop sound.

c.

In test tube A, the match stick burns with a pop sound.

d.

In test tubes A and B, the match stick burns with a pop sound.

Question 477

Question

MCQ▾

Phosphorus is kept in water. The reason behind this statement is

Choices

Choice (4)Response

a.

Phosphorus is a highly reactive non-metal

b.

It catches fire when exposed to air

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question 478

Question

MCQ▾

Identify the names from the given clues

A natural polymer whose chemical name is glucose

Choices

Choice (4)Response

a.

Coir

b.

Jute

c.

Wool

d.

Cotton

Question 479

Question

MCQ▾

We are familiar with the four R՚s used in environment protection. Identify the R used in the situations

Point out the activities which help to reduce pollution and save the environment.

1) Throwing plastic bags on the road and water bodies.

2) Using cotton or jute bags for shopping.

3) Using steel lunch box instead of plastic box.

4) Using thermocol or paper plates and cups instead of plastic plates and cups.

Choices

Choice (4)Response

a.

1 and 2

b.

1,2and 3

c.

2,3 and 4

d.

3 and 4

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