Tests For NO3‐ Flashcards
1
Q
NaNO3+ H2SO4
A
HNO3
2
Q
What does HNO3 give on heating? What is the indication
A
NO2+ O2 + H2O, brown fumes of NO2 in the bottom of the test tube
3
Q
What happens to HNO3 on exposure to light at 25 degree C
A
This time yellow NO2 is formed along with O2 and water
4
Q
What nitrates donot give brown ring test directly? And how can they be made to give the test?
A
Pb(NO3)2, Sr(NO3)2, Ba(NO3)2, Ca(NO3)2, Na2CO3 extract has to be prepared
5
Q
HNO3 + FeSO4
A
Fe2(SO4)3 + NO gas
6
Q
NO + FeSO4(aq)
A
[Fe(H2O)5NO]SO4
7
Q
NO3- + Zn + NaOH
A
[Zn(OH)4]²‐ + NH3 gas
8
Q
NO2‐ + Zn + NaOH
A
[Zn(OH)4]²‐ + NH3 gas
