The correct statement about the synthesis of pentaerythritol $(C(CH_2OH)_4)$ used in the preparation of $PETN$ is

Predict the product in the given reaction:
$3-\text{chlorobenzaldehyde} \xrightarrow{50\% \text{KOH}, \Delta} ?$

Match List-$I$ with List-$II$.
List-$I$ (Reaction):
$A$. Bicyclohexylidene $\rightarrow$ $2$ Cyclohexanone
$B$. Benzene $\rightarrow$ Benzophenone
$C$. Cyclohexanol $\rightarrow$ Cyclohexanone
$D$. Ethylbenzene $\rightarrow$ Potassium benzoate
List-$II$ (Reagents/Condition):
$I$. Benzoyl chloride / Anhydrous $AlCl_3$
$II$. $CrO_3$
$III$. $KMnO_4 / KOH, \Delta$
$IV$. $(i) O_3, (ii) Zn-H_2O$
Choose the correct answer from the options given below:

The mass of $NH_3$ produced when $131.8 \ kg$ of cyclohexanecarbaldehyde undergoes Tollen's test is $..... \ kg$. (Nearest Integer) Molar Mass of $C = 12 \ g/mol$,$N = 14 \ g/mol$,$O = 16 \ g/mol$.

Write the structural formulas and names of the four possible aldol condensation products from propanal and butanal. In each case,indicate which aldehyde acts as the nucleophile and which acts as the electrophile.

Compound $x$ having molecular formula $C_3H_6O$ is reduced by Red $P/HI$ to give compound $y$ $(C_3H_8)$. Since $x$ reduces Tollen's reagent,what is the possible structure of $x$?