Hydrolysis of compound A , two acids P and Q forms, P is used in etching of glass, Q on strongly heating gives a oxide R. R is used in estimation of carbon monoxide . Calculate total number of lone pairs on compound A .

Two aromatic compounds P and Q give product R.

The compound ratio of p : r and r: q is __________ .

Ethyl bromide is subjected to ammonolysis reaction to give compound 'P'. Compound 'P' reacts with nitrous acid in cold condition to give compound 'Q' with the liberation of nitrogen gas. What is the molecular weight of the compound 'Q' ?

When an oxide of manganese (P) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (Q). Compound (Q) disproportionates in neutral or acidic solution to give purple compound ( R) oxidises potassium iodide solution to a compound (S) and compound (P) is also formed. Compounds P to S are

Among P, Q, R, S the aromatic compound is

Among P, Q, R, S the aromatic compound is

Two aromatic compounds P and Q give product R. Reactant P, Q and reagent used in above reaction are: