Question

Which element exhibits the greatest number of oxidation states in its compounds ?

• A. $Ca$
• B. $V$
• C. $Cu$
• D. $Na$

Answer 1

Answer: (B)

$V$

$Ca$ shows $+1$ and $+2$ oxidation state

$V$ shows $+1,+2,+3,+4$ and $+5$ oxidation state

$Cu$ shows $+1,+2,+3$ and $+4$ oxidation state

Na shows $+1$ oxidation state

Hence, the correct option is $\text{B}$