Acids, Bases and Salts [CBSE (Central Board of Secondary Education) Class-7 Science]: Questions 7 - 12 of 17

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Question 7

Question MCQ▾

Phenolphthalein is colourless in water but changes to pink colour when added to a:

Choices

Choice (4)Response

a.

Acid

b.

Base

c.

Salt

d.

All of the above

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Question 8

Question MCQ▾

Quick lime or slaked lime added to the soil to make it:

Choices

Choice (4)Response

a.

Neutral

b.

Acidic

c.

Basic

d.

Question does not provide sufficient data or is vague

Edit

Question 9

Question MCQ▾

Commonly used acids in laboratory are called as:

Choices

Choice (4)Response

a.

Indicators

b.

Milk of magnesia

c.

Mineral acid

d.

Question does not provide sufficient data or is vague

Edit

Question 10

Question MCQ▾

Application of neutralisation in daily lives which helps in digestion of food are:

Choices

Choice (4)Response

a.

Acids in stomach

b.

Brushing teeth

c.

Question does not provide sufficient data or is vague

d.

All of the above

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Question 11

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

Edit

Question 12

Question MCQ▾

Acids are:

Choices

Choice (4)Response

a.

Turns blue litmus red

b.

Sour to taste

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Edit