Question

Consider the following substances :

NaCl, Ca(OH)₂ , NaHCO₃ , NH₃ , Na₂CO₃ , H₂O, Cl₂ , CO₂ , CaSO₄ .2H₂O, 2CaSO₄ .H₂O, CaOCl₂

(a) Which two substances combine to form bleaching powder ?

(b) Which four substances are utilised in the production of washing soda ?

(c) Which compound represents plaster of Paris ?

(d) Which compound is a part of baking powder ?

(e) Which compound is used as an antacid ?

Answer 1

(a) Ca(OH)₂ and Cl₂ 

(b) NaCl, NH₃ , H₂O, and CO₂ 

(c) 2CaSO₄ , H₂O

(d) NaHCO₃ 

(e) NaHCO₃