Thermite is a mixture of iron oxide and

Options

A. `4.5 atm`
B. `0.45 atm`
C. `0.6 atm`
D. None of these

Answer

B

Explanation

Let x is partial pressure of `A` and y is partial pressure of C when both equilibrium simultaneously established in a vessel
`{:(X(s),hArr,A(g),+,2B(g),,,),(,,x,,(2x+2y),,,,),(Y(s),hArr,C(g),+,2B(g),,,),(,,y,,(2y+2x),,,,),
(,(K_(p_(1)))/(K_(p_(2))),=(x)/(y),rArr,x=2y,,,),(K_(p_(1)),=x(2x+2y)^(2),rArr,,x=0.1atm,,:.,y=0.05atm,):}`
Total pressure of gases `=P_(A)+P_(B)+P_(C )=3(x+y)=0.45atm.`