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Chemistry

Chemistry
Which of the following elements is not present in stainless steel?

Iron
Chromium
Nickel
Tungsten

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Chemistry
A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be

Zinc
Copper
Silver
Aluminium

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Chemistry
The Bhopal gas tragedy was caused by the gas

Methyl Cyanide
Methyl Iso Cyanate
Methyl chloride
Methyl Iso Cyanide

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Chemistry
Atoms of same element having different mass numbers are called________

Isotopes
Isomers
Isobars
Isotones

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Chemistry
Cement is made hard with

Hydration and dissociation of water
Polymerisation
Dehydration
Dissociation of water

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Chemistry
The two metal ions that cause hardness to water are:

Calcium, Magnesium
Sodium, Potassium
Sodium, Calcium
Sodium, Magnesium

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