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Chemistry

Chemistry
Which of the following is not a noble gas ?

Neon
Argon
Hydrogen
Helium

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Chemistry
Which among the following is used to dilute oxygen in the gas cylinders used by divers ?

Neon
Krypton
Argon
Helium

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Chemistry
The purest form of Iron is :

Wrought iron
Steel
Pig iron
Cast iron

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Chemistry
Alum is used as

A fertilizer
An analgesic
A disinfectant
A purifier for water

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Chemistry
Sodium is produced by the electrolysis of

Molten sodium chloride
Molten sodium carbonate
Aqueous brine solution
Its cyanide complex

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Chemistry
White phosphorus is generally kept under

Glycerine
Water
Kerosene oil
Alcohol

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