`4x^2-9=(px+t)(px-t)`
In the equation above, p and t are constants. Which of the following could be the value of p ?

Options

A. Finely divided from of CuO kept in excess `O_(2)` would be completely converted to `Cu_(2)O`
B. Finely divided form `Cu_(2)O` of kept in excess `O_(2)` would be completely converted to CuO
C. Finely divided form of CuO kept in excess `O_(2)` would be converted to a mixture of CuO and `Cu_(2)O` (having more of CuO)
D. Finely divided form of CuO kept in excess `O_(2)` would be converted to a mixture of CuO and `Cu_(2)O` (having more of `Cu_(2)O` )

Answer

B

Explanation

`Cu_(2)O(s) +1/2O_(2) (g) , 2Cuo (g)`
`DeltaG_("reaction")^(@) = [2 xx (-30.4)] -(-34.98) = -25.82` kcal
and `-25.82 xx 10^(3) = -2.303 xx 2 xx 298` log R
`therefore R=10^(19)`, a very high value, hence reaction will be almost complete with a trace of `Cu_(2)O`