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Two beans having photons of energies 1eV...

Two beans having photons of energies `1eV` and `2.5eV` falls on a metal of work function `0.5eV`. The ratio of maximum speed of emitted electron will be:

A

Average formal charge on each oxygen atom is `0.67` unit.

B

It is planar and having eight lone pair

C

All `C-O` bond lengths are equal

D

Nodal plane f `Coverset(pi)(-)O` bond lies perpendicular to plane of `CO_(3)^(2-)` ion

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