When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are of

Question

When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are of (A) SO2 (B) SO3 (C) NO (D) NO2

Tardigrade Admin · Accepted Answer

When heated with conc. H2SO4 potassium nitrate undergoes double decomposition reaction forming free nitric add. Some of the nitric acid gets decomposed to give brown fumes of nitrogen dioxide. KNO3+H2SO4 → KHSO4+HNO3 4HNO3 → 4NO2+2H2O+O2

Q. When conc. $H_{2} S O_{4}$ is added to dry $K N O_{3}$ , brown fumes are evolved. These fumes are of

$S O_{2}$

$S O_{3}$

$NO$

$N O_{2}$

Q. When conc. H2​SO4​ is added to dry KNO3​, brown fumes are evolved. These fumes are of

SO2​

SO3​

NO

NO2​

When heated with conc. H2​SO4​ potassium nitrate undergoes double decomposition reaction forming free nitric add. Some of the nitric acid gets decomposed to give brown fumes of nitrogen dioxide. KNO3​+H2​SO4​→KHSO4​+HNO3​ 4HNO3​→4NO2​+2H2​O+O2​

Q. When conc. $H_{2} S O_{4}$ is added to dry $K N O_{3}$ , brown fumes are evolved. These fumes are of

$S O_{2}$

$S O_{3}$

$NO$

$N O_{2}$