It’s A? @Chirag_Hegde
Also can you tell me where are you practising stoichiometry from?
Yep A is correct
I'm doing mixed questions from GMP rn
See oxidation state goes from 5 to 4
English nhi aati unko.. Comma dalna bhul gye
What do they mean by the second line
I got valency of V as +5 in v2o5 and +4 in that sodium wala compound. So per V atom +1, and for 2 V atoms change in oxidation number is 2. So M/2.
#6 @Supreeta_Sen @ashish
The no change in OS part
Like do they mean +4 os is the least it can go
Nope, they meant that base causes no reduction.
Further reduction from the crystal form?
Crystalization ke baad there should be a full stop.
They mean that Jo bhi change in oxidation number hona tha vo reduction ke samay ho Chuka hai. After reduction they added base, which didn't have any effect on the oxidation number of vanadium.