Chemical Process
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of

Nitric acid
Hydrochloric acid
Sulphuric acid
Ammonium sulphate

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Chemical Process
Unsaturated oils compared to saturated oils have

Higher melting point & higher reactivity to oxygen
Higher melting point & lower reactivity to oxygen
Lower melting point & lower reactivity to oxygen
Lower melting point & higher reactivity to oxygen

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