CBSE Class-8 Science: Questions 81 - 88 of 469

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Question number: 81

» Crop Production and Management » Agricultural Practices » Crop

MCQ▾

Question

Two main branches of agriculture are

Choices

Choice (4) Response
a.

Agrinomy and horticulture

b.

Harvesting and Irrigation

c.

agronomy and animal husbandry

d.

Olericulture and production

Question number: 82

» Microorganisms: Friend and Foe » Microorganisms and Us » Medicinal Use of Microorganisms

MCQ▾

Question

Penicillin is obtained from the micro-organisms

Choices

Choice (4) Response
a.

Penicilliumnotatum

b.

Mushrooms

c.

Rhizobium

d.

Yeast

Question number: 83

» Synthetic Fibres and Plastics » Plastics and Environment » Non-Biodegradable Property of Plastics

MCQ▾

Question

Plastics are:

Choices

Choice (4) Response
a.

Biodegradable

b.

Non-biodegradable

c. None of the above
d. Question does not provide sufficient data or is vague

Question number: 84

» Materials: Metals and Non-Metals » Physical Properties of Metals & Non-Metals » Ductility

MCQ▾

Question

Thin wires are made from:

Choices

Choice (4) Response
a.

Non-metals

b.

Metals

c.

Metalloid

d. Question does not provide sufficient data or is vague

Question number: 85

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

MCQ▾

Question

Metal used in the formation of antiseptic is:

Choices

Choice (4) Response
a.

Hydrogen

b.

Nitrogen

c.

Sulphur

d.

Iodine

Question number: 86

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

MCQ▾

Question

Rayon is called regenerated fibre because:

Choices

Choice (4) Response
a.

its formation is the case of synthesis of cellulose

b.

its formation is a case of purification of cellulose

c.

of its shining softness and absorbing properties

d.

of the blending property of rayon

Question number: 87

» Synthetic Fibres and Plastics » Plastics » Thermosetting Plastics

MCQ▾

Question

Name one versatile material

Choices

Choice (4) Response
a.

Melamine

b.

Only a

c.

a and b

d.

Bakelite

Question number: 88

» Synthetic Fibres and Plastics » Plastics » Thermoplastics

MCQ▾

Question

Examples of thermoplastic material are

Choices

Choice (4) Response
a.

Nylon, Polythene

b.

PVC, PTFE

c.

Bakelite

d. Both a. and b. are correct

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