An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism:

A compound with molecular mass 180 is acylated with CH₃COCl to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is:

The gas leaked from a storage tank of the Union Carbide plant in Bhopal gas tragedy was:

Synthesis of each molecule of glucose in photosynthesis involves: