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 product $Y$ in the following reaction: $CH_3-CH=CH-CH_2-CHO + H_2 \xrightarrow{Ni} Y$

An alkene $(A)$ $C_{16}H_{16}$ on ozonolysis gives only one product $(B)$ $C_8H_8O$. $(B)$ can also be obtained by the hydrolysis of the product obtained from the reaction between cyanobenzene and $CH_3MgBr$. $(A)$ shows geometrical isomerism and decolourises $Br_2$ water. $(B)$ on treatment with $SeO_2$ produces $(C)$. Which statement is not correct about $(C)$?

Provide the conversion for the following:
$(i)$ Formaldehyde to Butan$-1-$ol
$(ii)$ $1-$Bromopropan$-2-$one from Isopropyl alcohol

Which of the following compounds does not give Tollen's test?

$CH_3-CHO \xrightarrow{dil. OH^{-} / \Delta}$ Major product formed in the above reaction is: