NSO Level 1- Science Olympiad (SOF) Class 9: Questions 1125 - 1128 of 1128

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Question 1125

Question

MCQ▾

Which of the following compounds will not decolorize bromine water?

(I)

(II)

(III)

(IV)

Choices

Choice (4)Response

a.

(II) and (III)

b.

(I) and (III)

c.

(II) only

d.

(IV) only

Question 1126

Question

MCQ▾

Boiling point of a liquid varies with the atmospheric pressure. At higher altitudes, the boiling point of water ________ as the atmospheric pressure ________.

Choices

Choice (4)Response

a.

Decrease, increases

b.

Increase, decreases

c.

Decrease, decreases

d.

Increase, increases

Question 1127

Question

Assertion-Reason▾

Assertion(Ꭺ)

When electricity is passed through acidified water, it decomposes into and .

Reason(Ꭱ)

Ratio of the gas obtained at anode to that of the gas obtained at cathode would be 2: 1.

Choices

Choice (4)Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

Question 1128

Question

MCQ▾

Phenolphthalein will turn pink in the aqueous solutions of the following salts:

(I) Potassium chloride

(II) Copper sulphate

(III) Sodium carbonate

(IV) Potassium acetate

Choices

Choice (4)Response

a.

Only (IV)

b.

(III) and (IV)

c.

(I) and (III)

d.

(II) and (IV)

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