Doubt from coordination compounds


Calculate oxidation state of Cr. Ans given is +6.

@Samarth_2020 what is the difference between (o)2 and o2 here??

@Samarth_2020 NH3 is neutral molecule. Can you explain it why it has -2 .

Yeah sorry, (O)2 actually gives -4

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This one too..

This is difference @pushkar_2020

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@Ankith_2020 you have got the reason in your question, but still asking for a reason?

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Try this too @Samarth_2020 @Ankith_2020

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Sir how do we know which atom bromine will displace?

@pushkar_2020
We are just trying possibilities here. Like In the second case, which ever NH3 you replace you will always get a facial isomer

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