Which of the following possess powerful mustard smell (and are called mustard oils)?

Which of the following is the strongest base in an aqueous solution?

The chemical reaction shown in the image represents the reduction of a diazonium salt to an aromatic hydrocarbon. Identify the reagent typically used for this transformation.

For the reaction shown,which statement is correct for Product "$X$"?

Which of the following chemicals are used to manufacture methyl isocyanate that caused the $Bhopal$ $Tragedy$?
$(i)$ $Methylamine$
$(ii)$ $Phosgene$
$(iii)$ $Phosphine$
$(iv)$ $Dimethylamine$

The major product formed in the following reaction is: