Q1 of 13 Page 158

Chlorine is prepared in the laboratory by the action of,

When hydrochloric acid (HCl) is added to potassium permanganate (MnO2) then chlorine gas is formed.


MnO2 + 4HCl → MnCl2 + Cl2 + H2O


On another hand Zn and HCl form Zinc chloride (ZnCl₂).


CaCO3 and HCl form calcium chloride (CaCl₂).


Pb(NO3)2 and HCl form Lead chloride (PbCl₂).

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1

The chief sources of oils used to make soap are,

 2

Fill in the blanks:

1. MnO2 + 4HCl → MnCl2 + _______ + ________ .


2. Common name of sodium chloride is ________ .


3. Chemical name of baking soda is ___________ .

 3

Answer the following:

Pure and dry chlorine gas is collected by the upward displacement of air. Give reason.

 3

Answer the following:

Name the compound of chlorine


1. Which is an anesthetic?


2. Which is used as a refrigerant?


3. Which is a disinfectant?


4. Which is used to make pipes and tube?


5. which liberates chlorine on exposure to air.