Acids, Bases and Salts-Natural Indicators Around Us [CBSE (Central Board of Secondary Education) Class-7 Science]: Questions 1 - 4 of 4

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Question 1

Question MCQ▾

If a cooked vegetable falls on the clothes or fabric it leaves a yellow stain on cloth. This yellow stain is due to the presence of:

Choices

Choice (4)Response

a.

Indicators

b.

Bases

c.

Acids

d.

Turmeric

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Question 2

Question MCQ▾

Which gases from the atmosphere combines with tiny droplets of water in clouds and leads to acid rain:

Choices

Choice (4)Response

a.

Nitrogen oxide & Sulphur dioxide

b.

Carbon dioxide

c.

Nitrogen oxide

d.

Sulphur dioxide

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Question 3

Question MCQ▾

Indicator is made using a hibiscus flower is:

Choices

Choice (4)Response

a.

Flower indicator

b.

China rose indicator

c.

Hibiscus indicator

d.

Question does not provide sufficient data or is vague

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Question 4

Question MCQ▾

Litmus is:

Choices

Choice (4)Response

a.

Indicator

b.

Extracted from lichens

c.

A natural dye

d.

All a., b. and c. are correct

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