NSO Level 1- Science Olympiad (SOF) Class 8: Questions 477 - 481 of 1076

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Question number: 477

» Metals and Non-Metals

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MCQ▾

Question

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 number: 478

» Synthetic Fibres and Plastics

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MCQ▾

Question

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 number: 479

» Synthetic Fibres and Plastics

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MCQ▾

Question

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

Question number: 480

» Metals and Non-Metals

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MCQ▾

Question

Which of the following metals react vigorously with water?

Choices

Choice (4) Response

a.

Mercury

b.

Zinc

c.

Copper

d.

Potassium

Question number: 481

» Synthetic Fibres and Plastics

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MCQ▾

Question

Chemicals like acids, phenyl, toilet cleaners, vinegar etc are filled in plastic bottles because

Choices

Choice (4) Response

a.

It is cheap and easy to handle

b.

It is light weight and strong

c.

Plastic is non reactive with almost all chemicals.

d.

Question does not provide sufficient data or is vague

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