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Q1. Stratospheric Pollution is caused due to:

• Photochemical smog
• Particulate
• Oxides of nitrogen
• Break down of Ozone

Solution

Stratospheric pollution is caused due to formation and breakdown of Ozone.

Q2. In winter polar Stratospheric clouds provide surface on which chlorine nitrate formed get hydrolysed to form:

• Chlorine free radical
• Nitrate free radical
• Molecular chlorine
• Hypochlorous acid

Solution

In winter polar Stratospheric clouds provide surface on which chlorine nitrate formed get hydrolysed to form:

Q3. Earth is protected from UV radiation by a layer of:

• Ozone
• Nitrogen
• Carbon dioxide
• Oxygen

Solution

Depletion of ozone layer causes stratospheric pollution.

Q4. Photochemical smog occurs in:

• Warm,dry and sunny climate
• Rainy climate
• Winter climate
• Frozen time

Solution

Photochemical smog occurs in warm,dry and sunny climate:

Q5. Industrial solid wastes are sorted out as:

• Chemical and non-chemical wastes
• Biodegradable and non-degradable wastes
• Classified and non-classified wastes
• Proportion ans improportion wastes

Solution

Industrial solid wastes are sorted out as biodegradable and non-degradable wastes.

Q6. The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called:

• BOD
• Iron
• Ammonia
• Sulphur

Solution

The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called BOD.                                                   

Q7. Which one is a biodegradable pollutant?

• Lead compounds
• Mercuric salts
• Pesticides
• Domestic wastes

Solution

The waste emerging from house can be decomposed by microorganisms.

Q8. Strategies that is of utmost importance for controlling environmental pollution is:

• Waste management
• Space management
• Do activities to create awareness
• Sharing space

Solution

Strategies that is very important for controlling environmental pollution is  waste management.

Q9. Rain water has a pH of 5.6 due to presence of:

• H⁺ ions
• Lone pairs
• Chain pair
• Dot structure

Solution

Rain water has a pH of 5.6 due to presence of H⁺ ions. 

Q10. Oxidation of ethene in the presence of ionic catalyst in aqueous medium produces:

• Hydrogen peroxide
• Ethyne
• Ethanal
• Methanal

Solution

Oxidation of ethene in presence of ionic catalyst in aqueous medium produces ethanal.

Q11. When acid from the atmosphere is deposited on the earth's surface it is known as:

• Acid rain
• Acid water
• Sulphur water
• Nitrogen water

Solution

When acid from the atmosphere is deposited on the earth's surface it is known as acid rain.

Q12. Human excreta contains bacteria which causes gastrointestinal diseases are:

• Escherichia coli
• Staphylococcus
• Lactic acid bacillus
• Listeria

Solution

Escherichia coli causes gastrointestinal diseases.

Q13. Presence of undesirable solid or gaseous particles in the air promotes:

• Sulphur pollution
• Tropospheric pollution
• Statospheric pollution
• Ozone depletion

Solution

Presence of undesirable solid or gaseous particles in the air promotes  tropospheric pollution.                                                                   

Q14. Fumes are obtained by:

• Evaporation of vapours in air
• Condensation of vapours during sublimation
• Combustion of Organic matter
• Grinding

Solution

Fumes are generally obtained by condensation of vapours during sublimation, distillation, boiling.

Q15. Lead emitted by vehicles interferes with development of:

• White blood cells
• Platelets
• Red blood cell
• Kidney

Solution

Lead emitted by vehicles interferes with development of Red blood cell.

Q16. Non-biodegradable wastes are  generated by thermal power plants which produces:

• Dioxygen
• Fly ash
• Sulphur trioxide
• Hydrogen peroxide

Solution

Non-biodegradable wastes are generated by thermal power plants which produces fly ash.   

Q17. Major contributors to acid rain are:

• HD
• Tritium
• SO₂ and NO₂
• Protium

Solution

Major contributors to acid rain are SO₂  and NO₂ because polluted air usually contains particulate that catalyse the oxidation.         

Q18. The process in which nutrient enriched water bodies support a dense plant population,which kills animal life by depriving it of oxygen is called as:

• Warm,dry and sunny climate
• Eutrophication
• Saponification
• Frozen time

Solution

The process in which nutrient enriched water bodies support a dense plant population,which kills animal life by depriving it of oxygen is called as eutrophication.  

Q19. The lowest region of atmosphere in which the human being along with other organisms live is known as:

• Lithosphere
• Troposphere
• Stratosphere
• Ionosphere

Solution

The lowest region of atmosphere in which the human being along with other organisms live is known as troposphere. 

Q20. B.O.D is:

• Bare oxygen demand
• Biological oxygen demand
• Chemical oxygen demand
• None of these

Solution

Biological oxygen demand is the amount of dissolved oxygen needed by aerobic bacteria to break down the organic matter.

Q21. Atmosphere traps the Sun's heat near the earth's surface. This is called:

• Global warming
• Acid rain
• Natural green house effect
• Biosphere

Solution

When atmosphere traps the sun energy near the earth surface then it is known as Natural green house effect.

Q22. Chemistry that deals with the study of the origin, transport, reactions, effects and facts of chemical species in the environment is known as:

• Archaeological Chemistry
• Forensic chemistry
• Pisiculture
• Environment chemistry

Solution

Chemistry that deals with the study of the origin, transport, reactions, effects and facts of chemical species in the environment is known as Environment Chemistry.

Q23. Which one is not correct for green house effect:

• Is due to high concentration of CO₂ in atmosphere
• Is influenced by gases such as CH₄, O₃ and chlorofluorocarbons
• Would result in warming up of the earth
• Would result in rise in ocean level due to melting of polar ice caps.

Solution

Global warming causes rise in ocean level due to melting of polar ice caps.

Q24. Presence of particulate matter in polluted air catalyses the oxidation of sulphur dioxide to:

• Dioxygen
• Nitric oxide
• Sulphur trioxide
• Hydrogen peroxide

Solution

Presence of particulate matter in polluted air catalyse the oxidation of sulphur dioxide to sulphur trioxide.

Q25. Vehicles emit a major air pollutant i.e:

• Lead
• Iron
• Ammonia
• Sulphur

Solution

Vehicles emit a major air pollutant i.e lead.        

Q26. For the purpose of bleaching clothes in the laundry we use:

• H₂O₂
• H₂SO₄
• HCl
• HNO₃

Solution

For the purpose of bleaching clothes in the laundry we use H₂O_2.                      

Q27. Acid rain is harmful for:

• human beings
• agriculture
• aquatic animals
• all of the above

Solution

Acid rain is harmful for agriculture as it washes away the nutrients. To human beings it causes Respiratory ailments and affects aquatic animals, when it flows to lakes, rivers.  

Q28. Ozone in the stratosphere is a product of UV radiations acting on:

• CFCs
• Dioxygen molecule
• Free oxygen atoms
• Chlorine atoms

Solution

Ozone in the stratosphere is a product of UV radiations acting on dioxygen molecule.

Q29. The word smog is derived from:

• Smoke and fog
• smoke
• fire
• water

Solution

 The word smog is derived from smoke and fog.

Q30. A synthetic toxic chemical with ecological repercussions is:

• Pesticides
• Tritium
• SO₂ and NO₂
• Protium