Question

Name the elements which constitute (1) caustic soda (2) baking soda

Answer 1

1) Caustic soda  is NaOH  ( Sodium Hydroxide) so its Na , O2 & H2
2) Baking Soda is  NaHCO3  (Sodium Bicarbonate ) so its Na , H2 , C4 & O2

Answer 2

Elements that constitute:
1) Caustic soda  
It is sodium hydroxide; formula is NaOH.

The elements are; Sodium, Oxygen and Hydrogen.

2) Caustic soda
It is sodium hydrogen carbonate, formula; NaHCO3 
 
Elements present;  sodium, hydrogen, carbon and oxygen.