$$ \text { Given below are the four isomeric compounds }(\mathrm{P}, \mathrm{Q}, \mathrm{R}, \mathrm{~S}) $$

Identify correct statements from below.

A. $\mathrm{Q}, \mathrm{R}$ and S will give precipitate with 2, 4-DNP.

B. $P$ and $Q$ will give positive Bayer's test.

C. Q and R will give sooty flame.

D. R and S will give yellow precipitate with $\mathrm{I}_2 / \mathrm{NaOH}$.

E. Q alone will deposit silver with Tollen's reagent

Choose the correct option.

The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below :-

Based on this, predict the solution/reagent that will help to distinguish "P" and "Q" obtained in the following reaction :-

Given below are two statements :

Statement I : Cross aldol condensation between two different aldehydes will always produce four different products.

Statement II : When semicarbazide reacts with a mixture of benzaldehyde and acetophenone under optimum pH , it forms a condensation product with acetophenone only.

In the light of the above statements, choose the correct answer from the options given below

$$ \text { Consider the following two reactions } \mathrm{A} \text { and } \mathrm{B} \text {. } $$

Numerical value of [molar mass of $x+$ molar mass of $y$ ] is $\_\_\_\_$