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Chemistry

Chemistry
Detergents used for cleaning clothes and utensils contain

Nitrates
Bicarbonates
Bismuthates
Sulphonates

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Chemistry
Freon' used as refrigerants is chemically

Chlorinated hydrocarbon
Fluorinated aromatic compound
Chlorofluoro hydrocarbon
Fluorinated hydrocarbon

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Chemistry
The percentage of carbon in cost iron is :

6 to 8
0.5 to 1.5
3 to 5
0.01 to 0.25

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Chemistry
Trinitrotoluene is

Used as an explosive
Used to fuse two metals
Used to melt metals
Used as an abrasive

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Chemistry
The mass of one Avogadro number of helium atom is

8.00 gram
4 x 6.02 x 1023 gram
4.00 gram
1.00 gram

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Chemistry
The iron ore magnetite consists of

FeCO3
3Fe2O3 .. 3H2O
Fe2O3
Fe3OH4

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