NSO Level 1- Science Olympiad (SOF) Class 10: Questions 694 - 698 of 986

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Question number: 694

» Chemical Reactions and Equation

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MCQ▾

Question

Which of the following observation help us to determine that the chemical reaction has taken place?

Choices

Choice (4) Response

a.

Evolution of a gas

b.

Change on colour

c.

Both a. and b. are correct

d.

None of the above

Question number: 695

» Acids, Bases and Salts

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MCQ▾

Question

Given below are certain chemical properties of a substance:

(i) It turns blue litmus red

(ii) It turns red litmus blue

Which one correct for ?

Choices

Choice (4) Response

a.

Only (i)

b.

Only (ii)

c.

(i) and (ii)

d.

None of the above

Question number: 696

» Chemical Reactions and Equation

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MCQ▾

Question

The reaction represents

Choices

Choice (4) Response

a.

Oxidation

b.

Combination

c.

Reduction

d.

Decomposition

Question number: 697

» Our Environment and Its Management

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MCQ▾

Question

The figure shows the different trophic level of the food chain.

Which of the given organisms belong to third trophic level?

Image of different trophic level of the food chain

Image of Different Trophic Level of the Food Chain

The figure shows the different trophic level of the food chain

Image of different trophic level of the food chain (iii)

Image of Different Trophic Level of the Food Chain (Iii)

The figure shows the different trophic level of the food chain (iii)

Image of different trophic level of the food chain (iv)

Image of Different Trophic Level of the Food Chain (Iv)

The figure shows the different trophic level of the food chain (iv)

Choices

Choice (4) Response

a.

(ii), (iii), (iv) and (vi)

b.

(i), (ii), (v) and (vi)

c.

(i), (iii), (iv) and (v)

d.

(ii), (iv), (v) and (vi)

Question number: 698

» Acids, Bases and Salts

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MCQ▾

Question

Read the paragraph and Answer the question.

On heating sodium carbonate and water. it gives is used for glass, soap and paper industries, cleaning agent for domestic purposes etc.

What is ?

Choices

Choice (4) Response

a.

b.

c.

d.