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Chemistry

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

Fe3O4
FeCO3
FeS2
Fe2O3

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Chemistry
Which of the following appeared to be with a significant potential for accumulation through food chains ?

Lindane
DDT
Parathion
Carbary

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Chemistry
________ gives hardness to stainless steel.

Tin
Lead
Carbon
Zinc

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Chemistry
When a bond is formed between two atoms, the energy of the system will

May increase or decrease
Decrease
Remain the same
Increase

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Chemistry
The gas used to extinguish fire is

Carbon monoxide
Carbon dioxide
Neon
Nitrogen

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Chemistry
Green house effect is accelerated by

All of these
Deforestation
Rapid industrialization
Increased transportation activity

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