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Chemical Kinetics question

2001 · Q99
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Chemical Kinetics question

2001 · Q99

NEETChemistryChemical KineticsMCQ+4 / −1
For the reaction;

2N2O5 →\to→ 4NO2 + O2 rate and rate constant are 1.02 ×\times× 10−-−4 and 3.4 ×\times× 10−-−5 sec−-−1 respectively, then concentration of N2O5 at that time will be
  1. A
    1.732
  2. B
    3
  3. C
    1.02 ×\times× 10−-−4
  4. D
    3.4 ×\times× 105
View written solutionFree

Correct answer: B

For the reaction;

2N2O5 →\to→ 4NO2 + O2

This is a first order reaction.

∴\therefore∴ rate = k [N2O5] ;

[N2O5] = ratek{{rate} \over k}krate​

= 1.02×10−43.4×10−5{{1.02 \times {{10}^{ - 4}}} \over {3.4 \times {{10}^{ - 5}}}}3.4×10−51.02×10−4​

= 3

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