Caustic soda is

Caustic soda solution is an absorbent for:

10g of caustic soda dissolved in 100mL of water makes a solution of caustic soda. Amount of caustic soda needed for 1 litre of water to make the same type of solution is ______.

Bayer's process : Caustic soda :: Hall's process : _____

Carborundum on heating with caustic soda in presence of air produces

Saponification of ethyl benzoate with caustic soda as alkali gives

Give chemical formula of Caustic soda?