The reduction of chloroform with $Zn$ and $HCl$ (alc.) gives ..........

What is the product $(B)$ of the following reaction sequence?

$A$ compound $X$ on heating with alcoholic $AgNO_3$ gives a white precipitate. Oxidation of $X$ gives an acid with the formula $C_8H_6O_4$,which easily forms a cyclic anhydride on heating. The compound $X$ is

Which of the following does not form a Grignard reagent?

What is the product formed by the reaction of $C_6H_5CH = CHCH_3$ with $HBr$?

Phosgene is formed slowly from which one of the following on exposure to air and sunlight?