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Q.

Manganese dioxide is used in
 

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a

making coins 

b

 Photography

c

 dry battery cells

d

 Pigment industry 

answer is B.

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Detailed Solution

  • MnO2 is used in the dry cell because it acts as a depolariser
  • Dry cell batteries, such as Leclanché cells, or zinc-carbon batteries, are the main applications for MnO2.It is used because of low cost and low toxicity.
     
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Manganese dioxide is used in