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Q.

Nitric oxide (NO) reacts with molecular oxygen as follows:
                                                   2NO(g)+O2(g)2NO2(g)
Initially NO  and O2 are separated as shown below. When the valve is opened, the 

reaction quickly goes to completion. Assume that the temperature remains constant at 
27° C.
[R=0.08 atm L/mol/K]

Question Image 

 List I List II
I)The number of moles of  NO2 after reaction in 4 L  flask isP)0
II)The pressure (in atm) of O2  in  2 L container after the reaction isQ)1
III)The ratio of partial pressure of NO2  in 4 L  container to   container isR)0.167
IV)The number of moles of NO  after reaction in 2 L  flask isS)0.056
  T)0.028

The correct option is:
 

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a

I – S, II – R, III – Q, IV – P

b

I – P, II – S, III – P, IV – R

c

I – S, II – R, III – S, IV – T

d

I – P, II – Q, III – R, IV – T

answer is A.

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Detailed Solution

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Question Image

 

 

 

 

 

nNO2in4Lvessel=nNO2(total)×46=0.056

pO2in2Lvessel=nO2(total)×26×0.08×3002=0.167atm

As the valve is open pressure of NO2 in both flasks will be the same.

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