What is the common name of potassium hydroxide:-
The correct option is C
Caustic potash
The common name of potassium hydroxide (KOH) is caustic potash and that of sodium carbonate (Na2CO3) is soda ash. Caustic soda is the common name for sodium hydroxide (NaOH) while lunar caustic is the common name given to silver nitrate (AgNO3).