NSO Level 1- Science Olympiad (SOF) Class 10: Questions 747 - 751 of 986

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Question number: 747

» 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.

(i) and (ii)

c.

Only (ii)

d.

None of the above

Question number: 748

» Sources of Energy

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MCQ▾

Question

Which of the following is correct for solar cooker?

Choices

Choice (4) Response

a.

A solar cooker is a device which utilizes solar energy for cooking food material

b.

Painted with black from inner side

c.

The lid of the box is provided with a plane mirror reflector and a glass sheet

d.

All a. , b. and c. are correct

Question number: 749

» Acids, Bases and Salts

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MCQ▾

Question

When the metal Zinc is added in hydrochloric acid, then we get,

Choices

Choice (4) Response

a.

Water

b.

Hydrogen gas

c.

Salt

d.

Question does not provide sufficient data or is vague

Question number: 750

» Acids, Bases and Salts

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MCQ▾

Question

Of a solution of is found to be completely neutralized by of a given solution of . If we take of the same solution of the amount Solution (the same solution as before) required to neutralize it will be

Choices

Choice (4) Response

a.

6

b.

12

c.

3

d.

22

Question number: 751

» Sources of Energy

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MCQ▾

Question

Choose correct disadvantage/ (s) of using wood as a fuel is/are

Choices

Choice (4) Response

a.

Less availability

b.

Expensive

c.

Produce smoke on burning

d.

None of the above