Which gives difference between aldehyde and ketone

Fehling solution $\Rightarrow$ Alkaline ${\mathrm{CuSO}}_4+\mathrm{Na}-\mathrm{K}$ tartarate

 Tollen's reagent  $\Rightarrow {\mathrm{NH}}_4\mathrm{OH}+{\mathrm{AgNO}}_3$

Schiffs reagent $\Rightarrow$P-rosaniline hydrochloride or magenta

Benedict's solution $\Rightarrow$ Alkaline ${\mathrm{CuSO}}_4+$ Citrate ions

All these reagents are used to distinguish between aldehydes and ketones. Aldehydes reacts with all these reagents while ketones do not react.