The general name of the compound formed by the reaction between aldehyde and alcohol is

Which of the following does not give an aldol reaction with dil. $NaOH$?

Which of the following reagents will convert isobutyraldehyde to the corresponding acid?

$I. HNO_3$	$II. NH_2NH_2 / OH^-$
$III. 2[Ag(NH_3)_2]^+$	$IV. NaOH$

Identify the suitable reagent for the reaction given below.
$CH_3-CO-CH_3 \xrightarrow[(ii) H_3O^+]{(i) ?} (CH_3)_3C-OH$

An optically active alkyl halide $C_4H_9Br$ $[A]$ reacts with hot $KOH$ dissolved in ethanol and forms alkene $[B]$ as the major product,which reacts with bromine to give dibromide $[C].$ The compound $[C]$ is converted into a gas $[D]$ upon reacting with alcoholic $NaNH_2.$ During hydration,$18 \ g$ of water is added to $1 \ mole$ of gas $[D]$ on warming with mercuric sulphate and dilute acid at $333 \ K$ to form compound $[E].$ The $IUPAC$ name of compound $[E]$ is $:$

The product $A$ obtained in the following reaction is: