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Chemistry 10th Class English Medium Online Test MCQs With Answers

Question # 1

The coal in which the percentage of carbon is 60%

Choose an answer

Peat

Lignite

Bituminous

Anthracit

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Question # 2

Mesosphere has a temperature range.

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17 ^oC - 58^oC

58^oC - 2^oC

2^oC - 93^oC

- 93^oC

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Question # 3

Reaction which have comparable amount of reactants and products at equilibrium state have.

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Very small Kc value

Very large Kc value

Moderate Kc value

None of these

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Question # 4

A pollutant is a waste material that pollutes.

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Air

Water

Soil

All of them

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Question # 5

Which one gas is liberated when alkalies react with ammonium salts?

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O₂

CO₂

H₂

NH3

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Question # 6

Building block of lipids are.

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Fatty acids

Carboxylic acids

Mineral acids

Alcohols

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Question # 7

Ozone depletion was first noticed is.

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1970's

1980's

1990's

1960's

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Question # 8

Which gas saves the surface of earth from ultra violet radiation?

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CO₂

N₂

O₃

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Question # 9

If Qc = Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

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Question # 10

The process of removal of gangue form the ore is technically known as:

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concentration

purification process

metallurgy

refining

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Question # 11

In which of the following groups, oxygen is attached on both sides with carbon atoms?

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Ketone

Ether

Aldehyde

Ester

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Question # 12

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

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Question # 13

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

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