NSO Level 1- Science Olympiad (SOF) Class 10: Questions 836 - 841 of 986

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Question 836

Question

MCQ▾

It is an optical instrument, which is thinner at the centre and thicker at the edges. The optical components are

Choices

Choice (4)Response

a.

Convex mirror

b.

Convex lens

c.

Prism

d.

Concave lens

Question 837

Question

MCQ▾

The compound reacts with sodium metal and releases hydrogen. The compound is

Choices

Choice (4)Response

a.

Methanol

b.

Ethanol

c.

Ethanoic acid

d.

Question does not provide sufficient data or is vague

Question 838

Question

MCQ▾

The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about

Choices

Choice (4)Response

a.

b.

c.

d.

Question 839

Question

MCQ▾

Read the given statements and mark the correct option.

Statement 1: is more basic than Wine

Statement 2: of baking soda is more than that of Bleach of the same concentrate.

Choices

Choice (4)Response

a.

Only statement 2 is Correct

b.

Only statement 1 is Correct

c.

All of the above

d.

Question does not provide sufficient data or is vague

Question 840

Question

MCQ▾

An amalgam alloy does not contain which of the following?

Choices

Choice (4)Response

a.

Mercury

b.

Silver

c.

Manganese

d.

Copper

Question 841

Question

MCQ▾

The compound reacts with ethanoic acid and releases water. The compound is

Choices

Choice (4)Response

a.

Ethanol

b.

Ethanoic acid

c.

Methanol

d.

None of the above

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