NEET Chemistry Hydrogen Questions Solved


Both temporary and permanent hardness are removed on boiling water with:

(a) Ca(OH)2

(b) Na2CO3

(c) CaCO3

(d) CaO

(b)

 CaHCO32 + Na2CO3           CaCO3 + 2NaHCO3                         Insoluble     CaCl2 + Na2CO3           CaCO3 + 2NaCl     Ca2+ or Mg2+ ions are removed as insoluble cabonates.

Difficulty Level:

  • 35%
  • 50%
  • 14%
  • 3%