No3 - will give brown No2 gas
But i haven't seen anywhere in qualitative where we test for No3- using Mn ,in general we use Cu.Please could you share the source from where you got this info?
Yeah i searched jd lee, no such reaction for no3-
Check for NO2- cuz nitrite gives conc. H2SO4 test. I think the question just wants us to know which radicals give conc. h2so4 test along with gas. NO2- does so.
No2- gives observation with dil h2so4 too, so it can't be X
Ohh yes. Then only NO3- is a possible answer. But what's the Mn in there for?
Yeah. The answer can be wrong. Apparently they correct answers if you someone writes to them .
Is there a possibility that ans is wrong and it should be 3 only?
Maybe they considered F- too assuming it to be similar
Just a guess
Possibility for that are bleak as there is a really specific rxn only for anions like F-,Ans given btw is No3- with no justification
yes i agree with @arush_kumar_singh and @Viraam_Rao .
the fourth one should br NO3- only.
NO3- reaction with conc H2SO4 giving brown NO2 gas.
Imo Mn will be of no use. only H2SO4 will do its part .