$C_{7}H_{10}O$ reacts with $CH_{3}MgBr$ to give a compound $C_{8}H_{12}O$ which gives a positive iodoform test. Identify the structure of $A$.

Write about $(a)$ Tollen's Test and $(b)$ Fehling solution. $OR$ Write the oxidation reaction of only aldehyde. $OR$ Write tests which are utilized to differentiate aldehydes and ketones.

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: $3$-chloro-$2$-methylpentan-$3$-one can be subjected to Wolff-Kishner reduction to give $3$-chloro-$2$-methylpentane.
Reason $R$: Wolff-Kishner reduction is used to convert $C=O$ into $CH_2$.

The major product of the following reaction sequence is:

Find the major product of the following reaction:
$Ph-CHO + CH_3-CHO \xrightarrow[\Delta]{Ca(OH)_2}$ Major product

Consider the following reaction sequence:
$B \xleftarrow{NaBH_4} CH_2=CH-CHO \xrightarrow{H_2/Pt} A$
Identify $A$ and $B$.