NSO Level 1- Science Olympiad (SOF) Class 8: Questions 474 - 476 of 1076

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Question number: 474

» Synthetic Fibres and Plastics

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MCQ▾

Question

Some of the most common blended fabrics are given in the questions. Find out the benefit of the blend over individual fabric.

A blend of polyster/cotton

Choices

Choice (4) Response

a.

Cotton wringles but the blended fabric does not wringle.

b.

Cotton is not much durable but the blended fabric is more durable.

c.

Polyster is not comfortable to wear but the blended fabric is more comfortable to wear.

d.

All a. , b. and c. are correct

Question number: 475

» Synthetic Fibres and Plastics

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MCQ▾

Question

We are familiar with the four R’s used in environment protection. Identify the R used in the situations

In Aditya’s school, students make posters and slogans as project to save environment and put up them in the school as well as nearby areas. The aim of this activity is to

Choices

Choice (4) Response

a.

Warn the people about the dangers of environment pollution.

b.

Make the people aware of the need of saving environment.

c.

Seek the involvement of people in keeping our environment safe and clean.

d.

All a. , b. and c. are correct

Question number: 476

» Metals and Non-Metals

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MCQ▾

Question

Diya was doing some experiments. The steps of procedure are given here.

i) took two test tubes, marked them as A and B.

ii) Put small pieces of copper wire in both the test tubes.

iii) added 4 to 5 drops of dilute hydrochloric acid in test tube A and dilute sulphuric acid in test tube B.

iv) Brought a lighted match stick near the mouth of the test tubes

The observation would be

Choices

Choice (4) Response

a.

In the test tubes A and B, the match stick extinguishes quickly.

b.

In test tube B, the match stick burns with a pop sound.

c.

In test tube A, the match stick burns with a pop sound.

d.

In test tubes A and B, the match stick burns with a pop sound.

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