Chemistry - Carbonyl compounds Question with Solution | TestHub

The nucleophilic addition of HCN to ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}$ results in major addition to $\mathrm{C}=\mathrm{C}$.

The nucleophilic addition of HCN to ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}$ results in major addition to $\mathrm{C}=\mathrm{O}$.

The nucleophilic addition of PhMgBr to $\mathrm{PhCH}=\mathrm{CH}-\mathrm{CHO}$ results in addition to $\mathrm{C}=\mathrm{O}$.

The nucleophilic addition of PhMgBr to $\mathrm{PhCH}=\mathrm{CH}-{\mathrm{COCMe}}_3$ results in addition to $\mathrm{C}=\mathrm{C}$.