Assertion : Isobutanal does not give iodoform test

Reason : It does not have $\alpha$-hydrogen. 

$\mathrm{Assertion} : -$ Benzamide and methyl benzoate are derivatives of benzoic acid.

$\mathrm{Reason} :-$ Benzamide is less easily hydrolysed as compared to methyl benzoate.

$\mathrm{Assertion} :-$ Mixture of benzaldehyde and acetaldehyde in hot alkaline medium gives cinnamaldehyde.

$\mathrm{Reason} :-$Benzaldehyde is strong electrophile than acetaldehyde.

Assertion (A) : Acetophenone shows aldol condensation.

Reason (R) : Acetophenone contains carbonyl group.

Assertion (A): ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CH}\left(\mathrm{OH}\right){\mathrm{CH}}_3$ gives benzoic acid with $\mathrm{NaOBr}$ followed by hydrolysis.

Reason (R): First dehydration occur then oxidation.

$\mathrm{Assertion} :-$ Ethyl acctoacetate forms butane- $1,4$ -diol with ${\mathrm{NaBH}}_4$.

$\mathrm{Reason} :-$ ${\mathrm{NaBH}}_4$ can reduces ketone and esters group.

$\mathrm{Assertion} :$Formic acid is a stronger acid than benzoic acid.

$\mathrm{Reason}$$:{\mathrm{pK}}_{\mathrm{a}}$ of formic acid is higher than that of benzoic acid.