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Chemistry

Chemistry
The lightest gas which is non-inflammable is

Nitrogen
Hydrogen
Oxygen
Helium

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Chemistry
Which of the following molecules has a bond order of 2.5

NO
CO
HCL
F2

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Chemistry
What is the most common salt in sea water ?

Sodium chloride
Potassium chloride
Magnesium sulphate
Calcium carbonate

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Chemistry
Which one of the following forms of phosphorus is most reactive?

White phosphorus
Violet phosphorus
Red phosphorus
Black phosphorus

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Chemistry
Alcoholic (– OH) group can be identified by :

Esterification Test
Ozonolysis Reaction
Tollen's Reagent Test
FeCl3Test

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Chemistry
The iron ore magnetite consists of

FeCO3
Fe3OH4
Fe2O3
3Fe2O3 .. 3H2O

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