NO + K2CR2O7 + H2SO4  HNO3 + K2SO4 + CR2(SO4)3 + H2O

4. NO + K

2

Cr

2

O

7

+ H

2

SO

4

 HNO

3

+ K

2

SO

4

+ Cr

2

(SO

4

)

3

+ H

2

O