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Chemistry

Chemistry
Which one is the most reactive halogen

Fluorine
Iodine
Bromine
Chlorine

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

Zero
4
–4
8

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Chemistry
Which of the following is used to denature ethanol ?

Methyl alcohol
Methane
Propyl alcohol
Phenol

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Chemistry
Malathion is a/an

Insecticide
Pesticide
Fumigant
Preservative

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Chemistry
Acid rain is caused due to pollution of atmosphere by

None of these
Oxides of nitrogen and phosphorous
Oxides of carbon and nitrogen
Oxides of nitrogen and sulphur

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Chemistry
Brass gets discoloured in air due to constant exposure in presence of:

Hydrogen sulphide
Aluminium phosphide
Hydrogenated wafers
Aluminium sulphide

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