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Byju's Answer
Standard IX
Chemistry
Nature of Reactant and Rate of Reaction
What is the o...
Question
What is the oxidation number of
C
r
in
N
a
2
C
r
2
O
7
?
A
6
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B
2
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C
16
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D
10
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Solution
The correct option is
A
6
Oxidation state of Na is +1 and oxygen is -2.
Thus,
2
×
(
+
1
)
+
2
×
(
x
)
+
7
×
(
−
2
)
=
0
2
+
2
x
−
14
=
0
2
x
−
12
=
0
x
=
+
6
Hence, option (b) is correct.
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