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Chemistry 10th Class English Medium Online Test MCQs With Answers

Question # 1

The gas use by plants to perform photosynthesis.

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O₂

CO₂

N₂

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Question # 2

Which gas is not present in atmosphere?

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Nitrogen

Oxygen

Helium

Carbon dioxide

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Question # 3

In smelting process a small amount of coke is required because:

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it is highly endothermic process

it is highly exothermic process

it is very fast process

it is very slow process

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Question # 4

Soda time is a mixture of:

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CaO and NaOH

CaCI2 and NaOH

CaO and ca(OH)2

CaCI2 and KOH

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Question # 5

Such reaction which can be made proceed in either direction depending upon the condition:

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simple reaction

reversible reaction

irreversible reaction

chain reaction

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Question # 6

Ethyne is oxidized by alkaline KMnO₄ then ....... hydroxyl group add to the triple bond.

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Two

Three

Four

Five

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Question # 7

Which is the essential sugar found in milk?

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Maltose

Lactose

Galactose

Starch

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Question # 8

Formula of Urea is.

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KCNO

H₂N-CO-NH₂

HN-CO₂-NH

H₃N-CO-NH₃

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Question # 9

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 # 10

Which are responsible for transmitting genetic information form generation to generation:

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vitamins

lipids

proteins

Nucleic acids

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Question # 11

Substitution reaction is the characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

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Question # 12

A base is a substance which neutralizes and acid. Which of these substances is not a base?

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aqueous ammonia

Sodium chloride

Sodium carbonate

Calcium oxide

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