Question # 1

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

The number of atoms in 0.0004 g of magnesium is close to

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24

2 x 10²⁰

10²⁰

6.02 x 10²³

Evaporation of water is

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An exothermic change

An endothermic change

A process where no heat changes occur

A process accompanied by chemical

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

Red lead is

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PbO

Pb₃O₄

PbO₂

Pb₄O₃

Ethanol containing some methanol is called

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Absolute spirit

Rectified spriit

Power alcohol

Methylated spirit

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