Aldehydes and Ketones

$\mathrm{C}_7 \mathrm{H}_{10} \mathrm{O}(A)$ reacts with $\mathrm{CH}_3 \mathrm{MgBr}$ to give a compound, $\mathrm{C}_8 \mathrm{H}_{14} \mathrm{O}$ which gives the iodoform test, then find out the structure of $A$.

For the following compounds, (2) $\mathrm{C}_6 \mathrm{H}_5-\mathrm{CHO}$ (3) $p-\mathrm{CH}_3-\mathrm{C}_6 \mathrm{H}_4-\mathrm{CHO}$ (4) $p-\mathrm{CH}_3 \mathrm{O}-\mathrm{C}_6 \mathrm{H}_4-\mathrm{CHO}$ The correct…

Identify structure of ' $P$ ' and ' $Q$ '.

What is the name of the following reaction? $\mathrm{PhCHO}+\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O} \stackrel{\mathrm{Na}(\mathrm{OAc})_2}{\longrightarrow}…

Benzaldehyde can be prepared from

Assertion : Mixture of benzaldehyde and acetaldehyde in hot alkaline medium gives cinnamaldehyde. Reason : Benzaldehyde is strong electrophile than acetaldehyde.

Assertion : Aldol condensation can be catalysed both by acids and bases. Reason : $\beta$-Hydroxy aldehydes or ketones readily undergo acid catalysed dehydration.

Compound $A$ (molecular formula $\mathrm{C}_3 \mathrm{H}_8 \mathrm{O}$) is treated with acidified potassium dichromate to form a product $B$ (molecular formula $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}$). $B$ forms a…

Assertion : $p$-N, $\mathrm{N}$-dimethylaminobenzaldehyde undergoes benzoin condensation. Reason: The aldehydic $(-\mathrm{CHO})$ group is meta directing.

In Oppenauer's oxidation,

Assertion : \(\left(\mathrm{CH}_3\right)_3 \mathrm{CCOC}\left(\mathrm{CH}_3\right)_3\) and acetone can be distinguished by the reaction with \(\mathrm{NaHSO}_3\). Reason : \(\mathrm{HSO}_3^{-}\)is the nucleophile in…

Toluene on treatment with \(\mathrm{CrO}_3\) and \(\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}\) followed by hydrolysis with dil. \(\mathrm{HCl}\) gives