Question

# Valency and oxidation number are different for an element. Valency of carbon is generally $$4$$, however, the oxidation state may be $$-4, -2, 0, +2, -1$$, etc. In the compounds containing carbon, hydrogen and oxygen, the oxidation number of carbon can be calculated as: Oxidation number of carbon$$=\displaystyle\frac{2n_O-n_H}{n_C}$$ where, $$n_H, n_O$$ and $$n_C$$ are number of respective atoms.In which of the following compounds, the valency of carbon is two?

A
Carbenes
B
Allenes
C
Alkenes
D
Ketenes

Solution

## The correct option is A CarbenesBy seeing the structures we can say that only carbenes has a valency of two.Chemistry

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