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Question
M+3 ion loses 3e. Its oxidation number will be
 
Options:
A .  0
B .  +3
C .  +6
D .  -3
Answer: Option C
:
C
Looking at the ion M3+ - clearly the oxidation number is +3.
Further -M3+ loses 3 electrons to be comeM6+.
Hence - the new oxidation number is 6.

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