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Chemistry

Chemistry
Percentage of carbon in steel ranges from

0.1 to 1.5
4.0 to 6.0
3.0 to 4.0
1.5 to 3.0

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Chemistry
The cathode of a lead storage battery is made up of

Lead
Manganese dioxide
Zinc
Lead oxide

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Chemistry
Diamond is lustrous because

Its refractive index is high
It is hard
It is colourless
It is pure

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Chemistry
Which one of the following metals does not react with water to produce Hydrogen ?

Cadmium
Potassium
Lithium
Sodium

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Chemistry
What is the most commonly used substance in fluorescent tubes?

Sodium oxide and argon
Mercury vapour and argon
Mercury oxide and neon
Sodium vapour and neon

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Chemistry
Aluminium can be purified by

Distillation
Electrolysis
Oxidation
Ozonolysis

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