NSO Level 1- Science Olympiad (SOF) Class 8: Questions 610 - 614 of 1076

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Question number: 610

» Combustion and Flame

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MCQ▾

Question

Hydrogen can be considered as the cleanest fuel. The explanation is

Choices

Choice (4)Response

a.

Hydrogen is an inflammable gas.

b.

Unlike carbon fuels, it does not produce any harmful bi products on burning.

c.

It burns in oxygen to form pure water.

d.

All a. , b. and c. are correct

Question number: 611

» Metals and Non-Metals

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MCQ▾

Question

Some uses of metals and non-metals are given here. Arrange them properly.

  1. Making utensils, bells, electric wires, ornaments etc.

  2. Production of fertilizers

  3. Production of crackers

  4. In water purification process

Choices

Choice (4)Response

a.

1 and 3 metals, 2 and 4 non-metals

b.

1 metals, 2,3 and 4 non-metals

c.

1 and 2 metals, 3 and 4 non-metals

d.

1 and 2 non-metals, 3 and 4 metals

Question number: 612

» Combustion and Flame

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MCQ▾

Question

Carbon fuels are harmful to health. The reason behind this statement is

Choices

Choice (4)Response

a.

Carbon fuels release unburnt carbon particles

b.

Incomplete combustion of carbon fuels produce carbon monoxide

c.

Unburnt carbon particles cause respiratory diseases

d.

All a. , b. and c. are correct

Question number: 613

» Metals and Non-Metals

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MCQ▾

Question

The non-metal used in vulcanization

Choices

Choice (4)Response

a.

Carbon

b.

Silica

c.

Sulphur

d.

Phosphorus

Passage

Observe the figures (a) & (b) carefully and answers below.

Image of Asexual Figure

Image of Asexual Figure

Question number: 614 (1 of 3 Based on Passage) Show Passage

» Reproduction in Animals

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MCQ▾

Question

The reproduction taking place in the given figures are an example of

Choices

Choice (4)Response

a.

Metamorphosis

b.

Asexual reproduction

c.

Sexual reproduction

d.

None of the above

Developed by: