Question # 1

Citric acid is present in

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Citrus fruits

Sour milk

Rancid butter

Apple

Arrhenius presented his concept about acids and bases in.

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1785

1787

1923

1930

According to Lewis concept a base is a substance which can donate.

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Proton

Electron pair

Neutron

Electron

Which gas is evolved when acids react with carbonates and bicarbonates?

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Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

Potassium Ferrocyanide is a:

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Normal salt

Mixed salt

Complex salt

Double salt

Which of one the following is Lewis base?

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BF3

H+

NH3

Ag+

In the preparation of insoluble salts, which one of the facts is incorrect?

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Two soluble salts are mixed

Two in soluble salts are mixed .

One of the salt produced is insoluble

Both of the salts produced are insoluble

A salt is not composed of

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A metallic cation

Non -metallic anion

an anion of a base

An anion of an acid

There are ____________ types of salts.

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2

3

6

8

Which of the following thing is a lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Word "acid" derived from:

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Urdu

English

Latin

Greek

A salt always

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Contain ions

Contains water of crystallization

Dissolves in water

Forms crystals which conduct electricity

When acid react with carbonates and bicarbonates which gas is evolved?

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H2

CO₂

Cl₂

N₂

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