NSO Level 1- Science Olympiad (SOF) Class 8: Questions 144 - 145 of 1175

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Question 144

Question

MCQ▾

Read the given statements and select the correct option.

Statement 1: Inexhaustible natural sources are those which are present in limited quantity in nature.

Statement 2: Inexhaustible natural sources are exhausted by human activities after some time; examples are forest, wildlife, coal, petroleum and natural gas.

Choices

Choice (4)Response

a.

Statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

b.

Statement 1 is true and statement 2 is false.

c.

Statements 1 and 2 are false.

d.

Statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

Question 145

Question

MCQ▾

There are some statements given below.

I. In fractional distillation process, substances with high boiling points condense at the top and substances with low boiling points condense at the bottom.

II. Petrochemicals are used in the manufacture of detergents, fibres, polythene and other man made plastics.

III. Coal tar is used to manufacture of graphite and calcium carbonate.

IV. Paraffin waxes are derived from petroleum

Which of the following statements are incorrect and mark the appropriate option?

Choices

Choice (4)Response

a.

III and IV only

b.

I and III only

c.

II and IV only

d.

II and III only

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