Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 14 Environmental Chemistry with Answers Pdf free download. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Environmental Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well.
Q.1 Ozone layer is present in
(a) Troposphere
(b) Stratosphere
(c) Mesophere
(d) Exosphere
(b) Stratosphere
Q.2 Which of the following is the coldest region?
(a) Troposphere
(b) Mesosphere
(c) Stratosphere
(d) Thermosphere
(b) Mesosphere
Q.3 Depletion of ozone layer causes
(a) Blood cancer
(b) Lung cancer
(c) Skin cancer
(d) Breast cancer
(c) Skin cancer
Q.4 Photochemical smog is formed in
(a) Summer during morning time
(b) Summer during day time
(c) Winter during morning time
(d) Winter during day time
(b) Summer during day time
Q.5 Who sediment of suspended matter occurs?
(a) When soil is eroded from the air
(b) When soil is eroded from the land
(c) When soil is eroded from the water
(d) When soil is eroded from the rock
(b) When soil is eroded from the land
Q.6 Which is most harmful for life on globe?
(a) Deforestation
(b) Soil Erosion
(c) Increasing Desert
(d) Nuclear Fallout
(d) Nuclear Fallout
Q.7 The aromatic compounds present as particulates are
(a) Benzene
(b) Toluene
(c) Nitrobenzene
(d) Poly cyclic hydrocarbons
(d) Poly cyclic hydrocarbons
Q.8 Domestic waste mostly constitutes
(a) Non-biodegradable pollution
(b) Biodegradable pollution
(c) Effluents
(d) Air pollution
(b) Biodegradable pollution
Q.9 The most abundant hydrocarbon pollutant is
(a) Methane
(b) Ethane
(c) Propane
(d) Butane
(a) Methane
Q.10 Excess nitrate in drinking water can cause
(a) methemoglobinemia
(b) kidney damage
(c) liver damage
(d) laxative effect
(a) methemoglobinemia
Q.11 One of the following is the chief source of water and soil pollution
(a) Agro industry
(b) Mining
(c) Thermal power stations
(d) All of these
(c) Thermal power stations
Q.12 Which of the following is true about photochemical smog?
(a) It is reducing in nature
(b) It is formed during winter
(c) It is a mixture of smoke and fog
(d) It causes irritation in eyes
(d) It causes irritation in eyes
Q.13 The region closest to earth’s surface is
(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) Thermosphere
(c) Troposphere
Q.14 What is the main reason for thermal pollution?
(a) Increase in the temperature of the ecosystem
(b) Increase in the chemical contains in water
(c) Hot water released by power plants and industries
(d) Pollution causing by vehicles
(c) Hot water released by power plants and industries
Q.15 Water sample is reported to be highly polluted if BOD (Biological Oxygen Demand) value of sample becomes
(a) more than 17 ppm.
(b) equal to 10 ppm.
(c) equal to 5 ppm.
(d) less than 5 ppm.
(a) more than 17 ppm.
Q.16 What is the indicator of pollution in water?
(a) Amount of oxygen
(b) Amount of hydrogen
(c) Amount of BOD
(d) Amount of nitrogen
(c) Amount of BOD
Q.17 Who did not win Noble prize in chemistry in 2005 for green chemistry among the following
(a) Y Chauvin
(b) R.H. Grubbs
(c) R.R. Schrock
(d) Polyani
(d) Polyani
Q.18 The pollutants released by jet aeroplanes in the atmosphere as fluorocarbons are called
(a) Photochemical oxidants
(b) Photochemical reductants
(c) Aerosols
(d) Physical pollutants
(c) Aerosols
Q.19 Which of the following acts as a sink for CO?
(a) Plants
(b) Haemoglobin
(c) Microorganisms present in the soil
(d) Oceans
(c) Microorganisms present in the soil
Q.20 The birds lay eggs with shells that are much thinner than normal is an example of _____________
(a) Bioaccumulation
(b) Mutation
(c) DNA sequence
(d) Mal nutrients
(a) Bioaccumulation
Q.21 Why thermal pollution causing the release of hot water by power plants is dangerous?
(a) They increase the solubility of oxygen
(b) They decrease the solubility of oxygen
(c) They dont dissolve oxygen
(d) They dissolve nitrogen
(b) They decrease the solubility of oxygen
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