Materials: Metals and Non-Metals [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 7 of 20

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Question 1

Question MCQ▾

Thin wires are made from:

Choices

Choice (4)Response

a.

Metals

b.

Metalloid

c.

Non-metals

d.

None of the above

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Question 2

Question MCQ▾

Metal used in the formation of antiseptic is:

Choices

Choice (4)Response

a.

Hydrogen

b.

Sulphur

c.

Iodine

d.

Nitrogen

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Question 3

Question MCQ▾

Food stuffs with acid components should not be stored in the utensils made of metals because:

Choices

Choice (4)Response

a.

Reaction between food stuff and utensil results into the production of toxic compound

b.

Corrosion of metal utensils takes place

c.

Acid in the food stuff react with utensil of metal

d.

Both a. and c. are correct

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Question 4

Question MCQ▾

Copper reacts with

Choices

Choice (4)Response

a.

Nitric acid

b.

Dilute hydrochloric acid

c.

Sulphuric acid

d.

Both a. and c. are correct

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Question 5

Question MCQ▾

Which metal react violently with water

Choices

Choice (4)Response

a.

Copper

b.

Silver

c.

Sodium

d.

Gold

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Question 6

Question MCQ▾

Metals react with acid and produce

Choices

Choice (4)Response

a.

Nitrogen dioxide

b.

Oxygen

c.

Hydrogen gas

d.

Sulphur dioxide

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Question 7

Question MCQ▾

Phosphorous is stored in water because it is:

Choices

Choice (4)Response

a.

less reactive to water

b.

Do not react with water

c.

More reactive to water

d.

None of the above

Edit