Chemistry
Gelatin is mostly used in making ice–creams in order to

Enrich the aroma
Stabilise mixture
Prevent making a colloid
Stabilise the colloid and prevent crystallisation

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Chemistry
Ammonial is a mixture of

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

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