Which of the following reagents converts phenyl methyl ketone into ethylbenzene?

Arrange the following compounds in the increasing order of their equilibrium constants for the formation of a hydrate:
$(I)$ $6$-amino-$1$-tetralone
$(II)$ $7$-amino-$1$-tetralone
$(III)$ $1$-tetralone
$(IV)$ $6$-nitro-$1$-tetralone

The Cannizzaro reaction is not given by . . . . . . .

The increasing order of the equilibrium constant for the formation of a hydrate from the following compounds is:

$C_6H_5CHO + C_6H_5COCH_3 \xrightarrow[293 \ K]{OH^{-}}$ product of reaction is . . . . . . .

Benzaldehyde and acetone can be best distinguished using