2 Carbon monoxide is mainly produced by: A Photosynthesis B Incomplete combustion of fuels C Volcanoes D Respiration
5 Which layer of the atmosphere is closest to the Earth? A Stratosphere B Mesosphere C Troposphere D Thermosphere
6 Which of the following is NOT a major air pollutant? A Carbon monoxide B Sulfur dioxide C Nitrogen D Nitrogen oxides
8 Sulfur dioxide in air mainly comes from: A Vehicle exhaust B Burning of fossil fuels C Photosynthesis D Respiration
10 Which pollutant reduces the oxygen-carrying capacity of blood? A Sulfur dioxide B Carbon dioxide C Carbon monoxide D Nitrogen dioxide
11 Which international agreement aims to protect the ozone layer? A Kyoto Protocol B Montreal Protocol C Paris Agreement D Geneva Convention
14 Which health problem is caused by increased UV radiation? A Malaria B Skin cancer C Tuberculosis D Cholera
16 The main cause of climate change is: A Natural cycles only B Human activities increasing greenhouse gases C Ozone formation D Photosynthesis
17 Which layer of atmosphere contains most of the air mass? A Stratosphere B Mesosphere C Troposphere D Thermosphere
18 Which practice helps control global warming? A Burning more coal B Increasing vehicle use C Using renewable energy D Deforestation
19 Acid rain is formed due to the presence of: A Carbonic acid only B Sulfuric and nitric acids C Hydrochloric acid D Acetic acid
20 Which of the following helps reduce air pollution? A Deforestation B Use of fossil fuels C Plantation D Industrial smoke
21 Which pollutant is mainly produced by burning coal? A Carbon dioxide B Sulfur dioxide C Nitrogen D Ozone
23 Which famous monument is damaged by acid rain? A Great Wall B Eiffel Tower C Taj Mahal D Statue of Liberty
25 Which gas is present in the highest percentage in the atmosphere? A Oxygen B Carbon dioxide C Nitrogen D Argon
26 Which layer of atmosphere is the coldest? A Troposphere B Stratosphere C Mesosphere D Thermosphere
27 Acid rain mainly damages: A Oceans only B Buildings and monuments C Ozone layer D Atmospheric pressure
28 Which of the following is a natural source of air pollution? A Factories B Vehicles C Volcanoes D Power plants
29 Global warming leads to: A Decrease in sea level B Increase in sea level C Stable climate D No climate change