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Q.

The pH of a solution of H2O2 is 6.0. Some chlorine gas is bubbled into this solution. Which of the following is correct?

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a

The PH of resultant solution become less than 6.0 and oxygen gas is liberated

b

Cl2O is formed in the resultant solution. 
 

c

Hydrogen gas is liberated 
 

d

The pH of resultant solution becomes 8.0 
 

answer is C.

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Detailed Solution

The reaction is as follows:

H2O2​+Cl2​  →   2HCl+O2​

When H2​O2​  reacts with chlorine gas, it forms more acidic HCl and thus decreases the pH.

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