NCERT Class 10 Science-Metals and Non-Metals[Occurrence of Metals] [NCERT Based General Studies (GS)]: Questions 1 - 7 of 13

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Question 1

Question MCQ▾

The process of heating an ore strongly below its melting point in the presence of excess of air is called as:

Choices

Choice (4)Response

a.

Leaching

b.

Calcination

c.

Roasting

d.

None of the above

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Question 2

Question MCQ▾

Metals refined by electrolytic reduction method are:

Choices

Choice (4)Response

a.

Silver, Gold

b.

Tin, Nickel

c.

Copper, Zinc

d.

All a., b. and c. are correct

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Question 3

Question MCQ▾

Metal oxides which are reduced by carbon are:

Choices

Choice (4)Response

a.

Lead oxide , Ferric oxides

b.

Manganese dioxide , Ferric oxide

c.

Zinc oxide ) , Tin oxide

d.

Both a. and c. are correct

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Question 4

Question MCQ▾

Unwanted earthly materials present in an ore are called as:

Choices

Choice (4)Response

a.

Metallurgy

b.

Concentration of ore

c.

Flux

d.

Gangue

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Question 5

Question MCQ▾

Metals occur in nature in:

Choices

Choice (4)Response

a.

Combined form

b.

Free form

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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Question 6

Question MCQ▾

Aluminium reduction method is also called as:

Choices

Choice (4)Response

a.

Alumino- thermic process

b.

Thermite process

c.

Thermite welding process

d.

All a., b. and c. are correct

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Question 7

Question MCQ▾

Galena, copper glance and cinnabar are:

Choices

Choice (4)Response

a.

Sulphide ores

b.

Carbonate ores

c.

Oxide ores

d.

Halide ores

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