NSO Level 1- Science Olympiad (SOF) Class 10: Questions 875 - 879 of 986

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Question number: 875

» Metals and Non - Metals

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MCQ▾

Question

Given

The most reactive and least reactive metal is

Choices

Choice (4)Response

a.

Na and Cu

b.

Fe and Sn

c.

Cu and Na

d.

Sn and Na

Question number: 876

» Our Environment and Its Management

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MCQ▾

Question

Select among the following the artificial self-sustaining ecosystem

(i) Mountains

(ii) Crop field

(iii) Grassland

(iv) Lake

(v) Park

(vi) Aquarium

(vii) Mangroves

Choices

Choice (4)Response

a.

(ii), (iii), (vi) and (vii)

b.

(ii), (v) and (vi)

c.

(iii), (vi) and (v)

d.

All of the above

Question number: 877

» Chemical Reactions and Equation

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MCQ▾

Question

Which of the following is not a chemical reaction?

Choices

Choice (4)Response

a.

Combustion (burning) of wood

b.

Dissolution of sugar in water

c.

Rusting of iron

d.

Metabolism of food in the body

Question number: 878

» Chemical Reactions and Equation

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MCQ▾

Question

Consider the following table:

Table shown the reactivity series

The reactivity series observation is showing in table.

From the above data, the decreasing order of reactivity of metal is

Choices

Choice (4)Response

a.

Al > Cu > Fe

b.

Fe > Al > Cu

c.

Al > Fe > Cu

d.

Question does not provide sufficient data or is vague

Question number: 879

» Acids, Bases and Salts

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MCQ▾

Question

Acetic acid was added to Sodium bicarbonates kept in a test tube. A colorless gas was evolved. It was concluded that

Choices

Choice (4)Response

a.

Acetic acid and Sodium bicarbonates evolved water

b.

Acetic acid and Sodium bicarbonates reacts to liberate gas

c.

All of the above

d.

Question does not provide sufficient data or is vague

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