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(a) In the following reaction :
MnO_{2}+4HCl\rightarrow MnCl_{2}+2H_{2}O+Cl_{2}

Identify the oxidant and reductant.

(b) Give reasons :

(i) Antioxidants are added to foods containing fats and oils.

(ii) White silver chloride turns grey in sunlight.

 

 

 

 
 
 
 
 

Answers (1)

(a) Substance oxidised =HCl

       Substance reduced =MnO_{2}

Oxidant or oxidising agent =MnO_{2}

Reductant or Reducing agent =HCl

(b) (i) Antioxidants are added to foods containing oils and fats to prevent them to react with air especially oxygen and become acid.

(ii) White silver chloride undergoes photolytic decomposition in presence of sunlight because it gives metal and Cl_{2} gas

        2AgCl\overset{sunlight}{\rightarrow}2Ag+Cl_{2}(g)

 

Posted by

Sumit Saini

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