Which of the following compounds does not give a positive Fehling's test?

Which is the major product of the following reaction?

Which of the following is reduced by $Zn-Hg/HCl$ to give the corresponding hydrocarbon?

The general order of reactivity of carbonyl compounds for nucleophilic addition reactions is

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 $(C)$?

Which of the following can decolorize aldehydes and ketones?