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 )

How are NO and NO 2 formed in the atmosphere?

NO is formed by the reaction of N 2 and O 2 during lightening or combustion of fossil fuels. It is further oxidised to NO 2 . At high altitude lightning strike or thunderstorm dinitrogen and dioxygen react with each other at high temperature and form oxide. N 2 ( g ) + O 2 ( g ) → 143 k 2 NO ( gas ) 2 NO + O 2 ( g ) → 2 NO 2 ( g )

E M B I B E

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

Shikha Goel and Saleha Parvez Solutions for Chapter: Atmospheric Pollution, Exercise 4: EXAM PRACTICE

Author:Shikha Goel & Saleha Parvez

Shikha Goel Chemistry Solutions for Exercise - Shikha Goel and Saleha Parvez Solutions for Chapter: Atmospheric Pollution, Exercise 4: EXAM PRACTICE

Attempt the practice questions on Chapter 8: Atmospheric Pollution, Exercise 4: EXAM PRACTICE with hints and solutions to strengthen your understanding. All In One ICSE Chemistry solutions are prepared by Experienced Embibe Experts.

Questions from Shikha Goel and Saleha Parvez Solutions for Chapter: Atmospheric Pollution, Exercise 4: EXAM PRACTICE with Hints & Solutions

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 8 - Atmospheric Pollution>EXAM PRACTICE>Q 13

The major source of water vapours are

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