Which of the following is used in the estimation of carbon monoxide?

Which of the following species does not exist?

Identify the incorrect statement about silica $(SiO_2)$.

Consider the following reaction:
$R_2SiCl_2 + H_2O \to (1) \xrightarrow{\text{polymerisation}} (2)$
Compound $(2)$ in the above reaction is:

Which gas burns with a blue flame?

At high temperature,nitrogen combines with $CaC_2$ to give: