Which of the following does not give Fehling solution test?

Which of the following compounds will give a yellow precipitate with iodine and alkali?

Predict the product of the following reaction:
$2,2',6,6'$-tetraformylbiphenyl $\xrightarrow[(ii)\,H^{+}/H_2O, 0^{\circ}C]{(i)\,NaOH (excess)}$ ?

$CH_3CHO + HCN$ $\xrightarrow{\text{H}^+} CH_3CH(OH)CN$ $\xrightarrow{\text{H}_3\text{O}^+} CH_3CH(OH)COOH$. In the above reaction,a chiral center is generated. What will be the nature of the resulting acid?

$CH_3-CH=CH-CH(OH)-CH_3 \xrightarrow{\text{Jones reagent}} X$,
Product $X$ is

End products of the following sequence of reactions are: