NSO Level 1- Science Olympiad (SOF) Class 8: Questions 482 - 488 of 1076

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Question number: 482

» Metals and Non-Metals

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MCQ▾

Question

Gold and silver are used to make ornaments. Which property of metals is used here?

Choices

Choice (4) Response

a.

Metals are lustrous

b.

Metals are ductile

c.

Metals are malleable

d.

All a. , b. and c. are correct

Question number: 483

» Metals and Non-Metals

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MCQ▾

Question

Metals are lustrous. A non-metal with lustre is

Choices

Choice (4) Response

a.

Iodine

b.

Sodium

c.

Graphite

d.

Carbon

Question number: 484

» Synthetic Fibres and Plastics

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MCQ▾

Question

Options are given in the jumbled form. Reshuffle the spellings and identify the correct options.

It is a synthetic fibre

Choices

Choice (4) Response

a.

Loynn

b.

Owlo

c.

Jetu

d.

Tontoc

Question number: 485

» Metals and Non-Metals

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MCQ▾

Question

Thin copper wire is used as LV fuse element. Which property of metals is used here?

Choices

Choice (4) Response

a.

Conductivity

b.

Ductility

c.

Comparatively low melting point

d.

All a. , b. and c. are correct

Question number: 486

» Metals and Non-Metals

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MCQ▾

Question

Which of the following is a metal?

Choices

Choice (4) Response

a.

Copper

b.

Carbon

c.

Coal

d.

Sulphur

Question number: 487

» Synthetic Fibres and Plastics

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MCQ▾

Question

Melamine is used to make kitchen ware. The property behind this statement is

Choices

Choice (4) Response

a.

It can resist heat and can tolerate higher temperature than plastic.

b.

It can be bent easily

c.

It gets deformed.

d.

Question does not provide sufficient data or is vague

Question number: 488

» Metals and Non-Metals

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MCQ▾

Question

Sita bought a copper lamp as a decorative piece and displayed it in her show case. After a month she found that it looked dull with green patches on it. She was so shocked to see this. She can remove it and bring the lustre back by

1) Rubbing the patched area with a piece of lemon.

2) Rubbing the patched area with tamarind.

3) Rubbing the patched area with a detergent

4) Rubbing the patched area with a clean cloth.

Choices

Choice (4) Response

a.

3 and 4

b.

1 and 4

c.

2 and 3

d.

1 and 2

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