Match the reactions given in Column I with the products given in Column II. Column I Column II 4 NO 2 + 2 H 2 O + O 2 → 2 SO 3 2 SO 2 + O 2 → particulate H 2 SO 4 SO 2 + H 2 O O 3 ( g ) O g + O 2 ( g ) ⇌ UV light 4 HNO 3

The process of preparation of HNO 3 i.e. Nitric Acid. The combination reaction in which nitrogen dioxide dissolves with rain water and oxygen to form Nitric Acid. 4 NO 2 + 2 H 2 O + O 2 → 4 HNO 3 The process of oxidation of SO 2 results in 2 SO 3 . When the fuels are burned, sulphur combines with the oxygen in presence of air to form sulphur dioxide. S + O 2 → SO 2 Sulphur dioxide is oxidised by the atmospheric oxygen to form sulphur trioxide. 2 SO 2 + O 2 → 2 SO 3 The absorption of SO 2 with water give results to sulphuric acid ( H 2 SO 4 ). When the fuels are burned, sulphur combines with the oxygen in presence of air to form sulphur dioxide. SO 2 + H 2 O → H 2 SO 4 Addition of atomic oxygen in molecular oxygen gives result of formation of ozone ( O 3 ). When UV rays interact with di-oxygen molecules ( O 2 ), it gets split up into free oxygen atoms, which combines with molecular oxygen to give ozone. O ( g ) + O 2 ( g ) ⇌ UV light O 3 ( g ) Column I Column II 4 NO 2 + 2 H 2 O + O 2 → 4 HNO 3 2 SO 2 + O 2 → particulate 2 SO 3 SO 2 + H 2 O H 2 SO 4 O g + O 2 ( g ) ⇌ UV light O 3 ( g )

E M B I B E

All In One ICSE Chemistry>Chapter 8 - Atmospheric Pollution>CHECK POINT 03>Q 2

HARD

9th ICSE

IMPORTANT

Earn 100

Draw the resonating structure of ozone.

Important Questions on Atmospheric Pollution

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 8 - Atmospheric Pollution>CHECK POINT 03>Q 3

Name the chemical responsible for ozone layer destruction?

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 8 - Atmospheric Pollution>CHECK POINT 03>Q 5

Which disease is caused due to hole in the ozone layer and why?

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 8 - Atmospheric Pollution>EXAM PRACTICE>Q 15

Match the reactions given in Column I with the products given in Column II.

Column I	Column II
$4 {NO}_{2} + 2 H_{2} O + O_{2} \to$	$2 {SO}_{3}$
$2 {SO}_{2} + O_{2} \overset{particulate}{\to}$	$H_{2} {SO}_{4}$
${SO}_{2} + H_{2} O$	$O_{3} (g)$
$O (g) + O_{2} (g) \overset{UV light}{⇌}$	$4 {HNO}_{3}$