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Chemistry

Chemistry
Identify the metal which is non toxic in nature.

Cadmium
Gold
Cobalt
Chromium

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Chemistry
Helium gas is filled in ballons because

It is lighter than air
Its atomic number is 2
It is one of the constitutents of water
It is a noble gas

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Chemistry
Silver gets corroded due to ________ in air.

Hydrogen Sulphide
Nitrogen
Carbon dioxide
Oxygen

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Chemistry
Milk is a

Element
None of these
Mixture
Metal

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Chemistry
Heavy metal pollution of water is caused by:

Paints
Domestic sewage
Acid Plants
Wood burning

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Chemistry
Percentage of carbon in steel ranges from

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

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