Which of the following would produce enantiomeric products when reacted with methyl magnesium iodide?

Give the reactivity order towards $HCN$ for the following compounds:
$(I)$ $Ph-CO-CH_3$
$(II)$ $CH_3-CO-CH_3$
$(III)$ $CH_3-CHO$
$(IV)$ $Ph-CO-CH_2-CH_3$

What is meant by the following terms? Give an example of the reaction in each case.
$(i)$ Cyanohydrin
$(ii)$ Acetal
$(iii)$ Semicarbazone
$(iv)$ Aldol
$(v)$ Hemiacetal
$(vi)$ Oxime
$(vii)$ Ketal
$(viii)$ Imine
$(ix)$ $2,4-DNP$ derivative
$(x)$ Schiff's base

The reagent$(s)$ which can be used to distinguish acetophenone from benzophenone is (are):

In the Cannizzaro reaction given below:
$2PhCHO \xrightarrow{:\mathop{O}\limits^{\ominus}H} PhCH_2OH + PhC\mathop{O_2^{\ominus}}\limits$
the slowest step is:

Which of the following compounds does not give the iodoform test?