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Chemistry

Chemistry
What is the covalency of nitrogen in ammonia molecule

4
2
5
3

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Chemistry
Higher concentration of nitrogen dioxide in atmosphere air causes

Asphyxiation
Bronchitis
Corrosion
Cancer

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Chemistry
The laws of electrolysis are given by

Faraday
Arrhenius
Ostwald
Lewis

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Chemistry
The property of hydrogen which distinguishes it from alkali metals is

Its electropositive character
Its non-metallic character
Its reducing character
Its affinity for non-metal

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Chemistry
Chile saltpeter is the common name of:

Sodium nitrite
Sodium nitrate
Potassium nitrate
Potassium nitrite

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Chemistry
The metals commonly used for electroplating are

Chromium, Copper and Nickel
Gold, Sodium and Chromium
Gold, Sodium and Potassium
Nickel, Lead and Chromium

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