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Chemistry

Chemistry
In which of the following states maximum iron ore is found ?

FeS2
FeCO3
Fe3O4
Fe2O3

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Chemistry
Tetra ethyle lead (TEL) is

A catalyst in burning fossil fuel
An antiknock compound
An antioxidant
A reductant

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Chemistry
The mineral containing both magnesium and calcium is

dolomite
magnesite
carnallite
calcite

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Chemistry
A powerful eye irritant present in smog is

Sulphur dioxide
Carbon dioxide
Peroxyacetyl nitrate
Nitric oxide

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Chemistry
The gas which is mainly responsible for the green house effect is:

Ozone
Carbon monoxide
Oxygen
Carbon dioxide

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Chemistry
Which of the following is an iron ore ?

Lignite
Nitrite
Bauxite
Magnetite

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