When NaNO2 is oxidised by K2Cr2O7, the important products formed are
Cr2(SO4)3 & Na2SO4
NaNO3 & Na2SO4
NaNO3 &Cr2(SO4)3
K2SO4 & Na2SO4
K2Cr2O7 + 4H2SO4 + 3NaNO2 → K2SO4 + Cr2(SO4)3 + 3NaNO3 + 4H2O
\(2NaOH ~+~ 2NO_2~\rightarrow~A ~+~B~+~ H_2O\); A & B are