Materials: Metals and Non-Metals (CBSE Class-8 Science): Questions 9 - 15 of 20

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Question number: 9

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

MCQ▾

Question

Metals when combine with oxygen forms oxides which are

Choices

Choice (4) Response

a.

basic in nature

b.

Neutral in nature

c.

acidic in nature

d.

All of the above

Question number: 10

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

MCQ▾

Question

Displacement reaction is:

Choices

Choice (4) Response

a.

Property of element in which a more reactive element displaces less reactive element from its compound in aqueous solution

b.

Reaction in which more reactive metal displaces a less reactive metal from its salt solution.

c.

Displacement of one metal with another metal

d.

Synthetic fibre which is used in place of wool

Question number: 11

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

MCQ▾

Question

Metal used for the galvanisation of iron is:

Choices

Choice (4) Response

a.

Copper

b.

Magnesium

c.

Zinc

d.

Aluminium

Question number: 12

» 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: 13

» 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: 14

» 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: 15

» 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

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