The addition reaction of $HCN$ to carbonyl compounds is an example of which of the following?

Which of the following reactions will not result in the formation of carbon-carbon bonds?

Predict the products of the following reactions with $CH_3CHO$:
$(i) CH_3CHO + C_6H_5MgBr$
$(ii) CH_3CHO + C_6H_{11}MgBr$
$(iii) CH_3CHO + (CH_3)_2CHMgBr$
Followed by acidic hydrolysis in each case.

Two compounds $A$ and $B$ with the same molecular formula $(C_{3}H_{6}O)$ undergo Grignard's reaction with methylmagnesium bromide to give products $C$ and $D$. Products $C$ and $D$ show the following chemical tests.

Test	$C$	$D$
Ceric ammonium nitrate Test	Positive	Positive
Lucas Test	Turbidity obtained after five minutes	Turbidity obtained immediately
Iodoform Test	Positive	Negative

$C$ and $D$ respectively are:

The correct sequence of reagents for the preparation of $Q$ and $R$ is:

The product obtained as a result of the reaction between acetone and chloroform is used as: