Number of reaction(s) that yield a gas which can act as gaseous air pollutant.
(i) $NH_{3} + O_{2} Pt-Rh catalyst 500 K, 9 bar$
(ii) $Na_{2} SO_{3} Zn + dil. H_{2} SO_{4}$
(iii) $NaNO_{2} dil. HCl$
(iv) $HCOOH conc. H_{2} SO_{4}$
(v) Chili salt petre $Δ$
(vi) Anglesite $Δ$

Question

Number of reaction(s) that yield a gas which can act as gaseous air pollutant.

(i) $NH_{3} + O_{2} Pt-Rh catalyst 500 K, 9 bar$

(ii) $Na_{2} SO_{3} Zn + dil. H_{2} SO_{4}$

(iii) $NaNO_{2} dil. HCl$

(iv) $HCOOH conc. H_{2} SO_{4}$

(v) Chili salt petre $Δ$

(vi) Anglesite $Δ$

TestHub · Accepted Answer

(i) N H 3 ​ + O 2 ​ Pt − R h ​ NO . NO is a gaseous air pollutant. (ii) N a 2 ​ S O 3 ​ + H 2 ​ S O 4 ​ → S O 2 ​ ↑ . S O 2 ​ is an air pollutant. (iii) N a N O 2 ​ + H Cl → NO + N O 2 ​ + … . NO / N O 2 ​ are gaseous pollutants. (iv) H COO H co n c . H 2 ​ S O 4 ​ ​ CO ↑ + H 2 ​ O . CO is an air pollutant. (v) Chili saltpetre ( N a N O 3 ​ ) on heating gives O 2 ​ , not a pollutant. (vi) Anglesite ( P b S O 4 ​ ) on heating gives S O 3 ​ , a gaseous pollutant. Number of reactions = 5

Chemistry - Environmental Chemistry Question with Solution | TestHub

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