When an unknown salt was warmed with copper turning and few drops of Concentrated tetraoxosulphate confirms??
Answers
Answer:
The brown gas (A) is nitrogen dioxide (NO
2
). Salt reacts with conc. sulphuric acid to form brown fumes of nitrogen dioxide.
MNO
3
+H
2
SO
4
→MHSO
4
+HNO
3
4HNO
3
→4NO
2
↑+O
2
+2H
2
O
The fumes intensify when copper turnings are added.
3Cu+8HNO
3
→3Cu(NO
3
)
2
+2NO↑+4H
2
O
2NO+O
2
→2NO
2
At low temperature, odd electron, brown coloured NO
2
gas dimerises to colourless N
2
O
4
.
NO
2
is paramagnetic and N
2
O
4
is diamagnetic.
2NO
2
−11degC
⇌
N
2
O
4
Answer:
The brown gas (A) is nitrogen dioxide (NO
2
). Salt reacts with conc. sulphuric acid to form brown fumes of nitrogen dioxide.
MNO
3
+H
2
SO
4
→MHSO
4
+HNO
3
4HNO
3
→4NO
2
↑+O
2
+2H
2
O
The fumes intensify when copper turnings are added.
3Cu+8HNO
3
→3Cu(NO
3
)
2
+2NO↑+4H
2
O
2NO+O
2
→2NO
2
At low temperature, odd electron, brown coloured NO
2
gas dimerises to colourless N
2
O
4
.
NO
2
is paramagnetic and N
2
O
4
is diamagnetic.
2NO 2
−11degC
⇌
N
2
O