Which of the following compounds has the most acidic hydrogen?

Consider the following sequence of reactions:
Isopropyl benzene $\xrightarrow{O_2} x$ $\xrightarrow[H_2 O]{H^{+}} y + z$
The incorrect statement about $z$ is:

The product $(A)$ of the reaction is:

Compare the rate of reaction toward Beckmann rearrangement for the given oxime derivatives where $\gamma$ is: $(i) CH_3COO^-$,$(ii) ClCH_2COO^-$,$(iii) PhSO_3^-$.

For the conversion of cyclohexanone to $1-$hydroxy$-1-$methylcyclohexan$-2-$one,the correct order of reagents used is:
$(1)$ $CH_3MgBr / H^+$
$(2)$ $H^+ / \Delta$
$(3)$ $KMnO_4$ (cold dil.)
$(4)$ $CrO_3$

Acetone and acetaldehyde can be distinguished by