Question : Which among the following has the highest boiling point?

Option 1: NaCl

Option 2: CaO

Option 3: CaCl₂

Option 4: LiCl

Question : The buffer action of blood is due to the presence of:

Option 1: HCl and NaCl

Option 2: Cl^- and CO₃^2-

Option 3: Cl^- and HCO^-₃

Option 4: HCO₃^- and H₂CO₃

Question : Stalactites and Stalagmites form due to the precipitation of:

Option 1: CaCO₃

Option 2: CaCl₂

Option 3: MgCl₂

Option 4: MgCO₃

Question : The chemical formula of washing soda is

Option 1: Na₂So₄ .10H₂O

Option 2: NaHCO₃

Option 3: Na₂CO₃.10H₂O

Option 4: Ca(OH)₂

Question : In the human body, which of the following organs is responsible for water balance?

Option 1: Heart

Option 2: Liver

Option 3: Kidneys

Option 4: Lungs