NSO Level 1- Science Olympiad (SOF) Class 8: Questions 467 - 473 of 1076

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Question number: 467

» Synthetic Fibres and Plastics

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MCQ▾

Question

Two examples of thermo plastics are

  1. Polythene

  2. PVC

  3. Bakelite

  4. Melamine

Choices

Choice (4) Response

a.

3 and 4

b.

2 and 3

c.

1 and 4

d.

1 and 2

Question number: 468

» 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

The polymer in Teflon is

Choices

Choice (4) Response

a.

Poly vinyl chloride

b.

Poly ethylene

c.

Polytetrafluoroethylene

d.

Nylon

Question number: 469

» Metals and Non-Metals

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MCQ▾

Question

Aluminium foils are used to wrap food. Which property of metals is used here?

Choices

Choice (4) Response

a.

Hardness

b.

Ductility

c.

Conductivity

d.

Malleability

Question number: 470

» Metals and Non-Metals

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MCQ▾

Question

Copper is used to make electric wires. Which property of metals is used here?

Choices

Choice (4) Response

a.

Conductivity

b.

Ductility

c.

Malleability

d.

Both a. and b. are correct

Question number: 471

» Synthetic Fibres and Plastics

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MCQ▾

Question

The uses of some materials are given in the statement. Identify them

The source of plastic is

Choices

Choice (4) Response

a.

Wood pulp

b.

Rubber

c.

Plant gum

d.

Petroleum

Question number: 472

» Metals and Non-Metals

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MCQ▾

Question

The chemical reaction taking place in rust formation is

Choices

Choice (4) Response

a.

b.

c.

d.

Fe +

Question number: 473

» Synthetic Fibres and Plastics

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MCQ▾

Question

Bakelite is used to make switch boards. The property helping this is

Choices

Choice (4) Response

a.

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

b.

It gets deformed easily.

c.

It is a poor conductor of electricity

d.

It can be bend easily

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