CBSE Class-8 Science: Questions 103 - 110 of 469

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Question number: 103

» Materials: Metals and Non-Metals » Physical Properties of Metals & Non-Metals » Metals Are Good Conductors of Electricity

MCQ▾

Question

Metals are:

Choices

Choice (4) Response
a.

Bad conductor of electricity

b.

Good Conductor of electricity

c.

Semi -conductor of electricity

d. All of the above

Question number: 104

» Materials: Metals and Non-Metals » Metals & Non- Metals » Uses of Metals and Nonmetals

MCQ▾

Question

Metals used in formation of alloys are:

Choices

Choice (4) Response
a.

Magnesium, Lead

b.

Magnesium, Lead, Copper

c.

Copper, Lead

d.

Zinc, Aluminium

Question number: 105

» Synthetic Fibres and Plastics » Plastics » Thermosetting Plastics

MCQ▾

Question

Plastics whose shape cannot be changed even by heating are:

Choices

Choice (4) Response
a.

Thermoplastic

b.

a and b

c.

Thermosetting

d.

Polythene

Question number: 106

» Synthetic Fibres and Plastics » Types of Synthetic Fibres » Characteristics of Synthetic Fibres

MCQ▾

Question

The characteristics of synthetic fibres are:

Choices

Choice (4) Response
a.

Not attacked by insects and pests

b.

More durable

c.

Less Expensive

d. All a. , b. and c. are correct

Question number: 107

» Synthetic Fibres and Plastics » Types of Synthetic Fibres » Rayon

MCQ▾

Question

Another name for rayon is:

Choices

Choice (4) Response
a.

Synthetic fibre

b.

Artificial fibre

c.

Artificial silk

d.

Man-made fibre

Question number: 108

» Materials: Metals and Non-Metals » Chemical Properties of Metals & Non-Metals » Reactions With Bases

MCQ▾

Question

Pop sound indicates that:

Choices

Choice (4) Response
a.

Metals do not react with bases

b.

Metals react with bases and produce hydrogen gas

c.

Metal react with bases

d.

Non-Metals react with bases

Question number: 109

» Materials: Metals and Non-Metals » Chemical Properties of Metals & Non-Metals » Reaction With Oxygen

MCQ▾

Question

Oxides of Non-Metals are:

Choices

Choice (4) Response
a.

Amphoteric in nature

b.

Acidic in nature

c.

Neutral in nature

d.

Basic in nature

Question number: 110

» Synthetic Fibres and Plastics » Plastics as Materials of Choice » Plastic Is Non-Reactive

MCQ▾

Question

Plastic is used for storing chemicals in laboratory because

Choices

Choice (4) Response
a.

Plastic containers do not get corroded

b.

They resist chemical attack

c.

It is non-reactive

d. All a. , b. and c. are correct

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