Amongst the following identify the species with an atom in $$+ 6$$ oxidation state
A.
$$MnO_4^ - $$
B.
$$Cr\left( {CN} \right)_6^{3 - }$$
C.
$$NiF_6^{2 - }$$
D.
$$Cr{O_2}C{l_2}$$
Answer :
$$Cr{O_2}C{l_2}$$
Solution :
TIPS/Formulae :
(i) In an ion sum of oxidation states of all atoms is equal to charge on ion and in a compound sum of oxidation states of all atoms is always zero.
Oxidation state of $$Mn$$ in $$MnO_4^ - = + 7$$
Oxidation state of $$Cr$$ in $$Cr\left( {CN} \right)_6^{3 - } = + 3$$
Oxidation state of $$Ni$$ in $$NiF_6^{2 - } = + 4$$
Oxidation state of $$Cr$$ in $$Cr{O_2}C{l_2} = + 6$$
Releted MCQ Question on Physical Chemistry >> Some Basic Concepts in Chemistry
Releted Question 1
$$27 g$$ of $$Al$$ will react completely with how many grams of oxygen?