$2CHCl_3 + O_2 \xrightarrow{X} 2COCl_2 + 2HCl$. In the above reaction,$X$ stands for:

Compare the rate of reaction with $AgNO_3$ for the following compounds:

$A$ compound $A$ $(C_5H_{10}Cl_2)$ on hydrolysis gives $C_5H_{10}O$ which reacts with $NH_2OH$,forms iodoform,but does not give Fehling's test. $A$ is:

What is not present in a Grignard reagent?

Ethyl orthoformate is formed by heating which of the following compounds with sodium ethoxide?

Which among the following has the highest boiling point?