Chemistry
Ammonial is a mixture of

Aluminium powder and potassium nitrate
Aluminium powder and ammonium sulphate
Aluminium powder and ammonium chloride
Aluminium powder and ammonium nitrate

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Chemistry
The BOD values of water indicate the

Amount of oxygen used for biochemical oxidation
Amount of organic debris
Amount of oxygen used for biochemical reduction
Amount of ozone used for biochemical oxidation

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