Question

Lithium shows similarities in properties with Magnesium. 

(a) Name the above phenomenon. 

(b) Give any two similarities of Lithium with Magnesium. 

(c) How is bleaching powder prepared?

Answer 1

(a) Diagonal relationship 

(b) (1) Both Lithium and Magnesium are harder and lighter than other elements in the respective groups.

(2) The oxides of both (Li₂O and MgO) do not combine with excess O₂ to give any superoxide. 

(c) It is prepared by passing Cl gas through dry slaked lime. 

2Ca(OH)₂ + 2Cl₂ → CaCl₂ + CaOCl₂ + 2H₂O