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

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Question 875

Question

MCQ▾

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 876

Question

MCQ▾

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 877

Question

MCQ▾

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 878

Question

MCQ▾

Consider the following table:

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 879

Question

MCQ▾

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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