Question # 1

Dilute acid react with carbonates the produce product except _________

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Salt

Water

Carbon di oxide

Hydrogen gases

Which acid is used for food preservation?

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Hydrochloric acid

Benzoic acid

Sulphuric acid

Nitric acid.

The colour of litmus in a strong basic solution become.

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Yellow

Blue

Red

Colourless

Which one is not a characteristic of an acid:

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it turns red litmus blue

it reacts with base to form salt and water

Its aqueous solution conduct electric current

it has sour taste

Which one is used for alkaline batteries?

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NaOH

Ca(OH)₂

KOH

Mg(OH)₂

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

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Proton

Electron pair

Neutron

Electron

Formic acid is present in

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String of bees

Sour milk

Apple

Fats

Which one of the following is Lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Which acid is used for etching glass?

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HF

HCl

HBr

HI

When Bronsted and Lowry put forward acid base concept?

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1913

1923

1933

1943

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