The following data is obtained during the first order thermal decomposition of
`2A(g)rarrB(g)+C(s)` at constant volume and temperature
`{:("S.No.","Time","Total pressure"),(1.,"At the end of 10 minutes",300),(2.,"After completion",200):}`
The rate constant in `"min"^(-1)` is

Options

A. `0.0693`
B. `6.93`
C. `0.00693`
D. `69.3`

Answer

A

Explanation

For first order reaction
`k=(0.693)/(t_(1//2))impliesk=(0.693)/(10)`
`k=0.0693"min"^(-1)`