Predict the products of the following reactions:
$(i)$ Cyclopentanone + $NH_2OH \xrightarrow{H^+} ?$
(ii) Cyclohexanone + $2,4-DNP \xrightarrow{H^+} ?$
(iii) $R-CH=CH-CHO + NH_2CONHNH_2 \xrightarrow{H^+} ?$
(iv) Acetophenone + $CH_3CH_2NH_2 \xrightarrow{H^+} ?$

(N/A) The reactions involve the nucleophilic addition of ammonia derivatives to carbonyl compounds followed by the elimination of a water molecule to form imine derivatives.
$(i)$ Cyclopentanone + $NH_2OH \xrightarrow{H^+} \text{Cyclopentanone oxime} + H_2O$
(ii) Cyclohexanone + $2,4-DNP \xrightarrow{H^+} \text{Cyclohexanone-2,4-dinitrophenylhydrazone} + H_2O$
(iii) $R-CH=CH-CHO + NH_2CONHNH_2 \xrightarrow{H^+} R-CH=CH-CH=NNHCONH_2 + H_2O$
(iv) Acetophenone + $CH_3CH_2NH_2 \xrightarrow{H^+} \text{N-ethylacetophenone imine} + H_2O$