Question # 1

Which acid used for food preservation?

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H₂SO₄

HNO₃

HCl

CH₃COOH

Acidic solutions have pH value.

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Less than 7

Greater than 7

equal to 7

None of these

Which is used to remove the grease stains from clothes?

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NaOH

KOH

Al(OH)₃

NH₄OH

Water of crystallization is responsible for.

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Melting points of crystals2

Boiling point of crystal

Shape of crystal

Transition points of crystals

The colour of litmus in a strong basic solution become.

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Yellow

Blue

Red

Colourless

Grease stains from clothes are removed by sing.

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Ammonium nitrate

Aluminium hydroxide

Ammonium hydroxide

Aluminum chloride

Which of following is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

conjugate base of HCl is:

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HCl^-

CH

Cl

NH₃

All bases turn red litmus

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Red

Blue

Pink

White

Bronsted and Lowry presented their theories of acids and bases in

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1785

1787

1923

1925

There are ____________ types of salts.

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2

3

6

8

When acid reacts with sulphites and Bi sulphates which gas is evolved?

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H2

CO₂

SO₂

NH₃

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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