NSO Level 1- Science Olympiad (SOF) Class 7: Questions 172 - 176 of 597

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Question number: 172

» Physical and Chemical Changes

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MCQ▾

Question

Which of the following is formed when Magnesium ribbon is burnt?

Choices

Choice (4)Response

a.

Magnesium oxide

b.

Magnesium dioxide

c.

Magnesium carbide

d.

Magnesium sulphide.

Question number: 173

» Physical and Chemical Changes

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MCQ▾

Question

Which of the following is produces during the combustion of coal?

Choices

Choice (4)Response

a.

Sulphur dioxide

b.

Carbon dioxide

c.

Carbon monoxide

d.

Both a. and b. are correct

Question number: 174

» Fibre to Fabric

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MCQ▾

Question

Read the following statements.

  1. Silkworm producing Tussar silk feeds on leaves.

  2. The process of obtaining silk fibre from the cocoon is called.

Choose the option which fills the above blanks correctly.

The process of obtaining silk fibre

The Process of Obtaining Silk Fibre

Choices

Choice (4)Response

a.

Polyantha, shearing

b.

Sal, Reeling

c.

Polyantha, Reeling

d.

Sal, Shearing

Question number: 175

» Heat

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MCQ▾

Question

Which of the following packaging is most suitable to carry ice for longer distances?

Choices

Choice (4)Response

a.

Thermocole

b.

Sawdust.

c.

Sand

d.

Ice paper

Question number: 176

» Physical and Chemical Changes

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MCQ▾

Question

The ability or inability of a matter to undergo in the transitional change between different states in which the given matter can exist is due to change in which of the following characteristic property?

Choices

Choice (4)Response

a.

Physical property

b.

Physical change.

c.

Chemical property

d.

Chemical change

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