Question

Which of the following preperation method for benzene is not correct
A. `3HC-=CHunderset("Fe tube")overset("Red hot")(rarr)`
B. , `underset(600^(@)C)overset(Cr_(2)O_(3)-Al_(2)O_(3))(rarr)`
C.
D.

Answer 1

Correct Answer - B::D
Above `T_(B)`, slope of `Z v//s P gt 0` (at low pressure). Also valid for `H_(2)` and He above critical temperature.