CBSE Questions for Class 11 Medical Chemistry Environmental Chemistry Quiz 5 - MCQExams.com

In the atmosphere, the layer above the troposphere is:
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  • Troposphere
  • Stratosphere
  • Mesosphere
  • Exosphere
Which of the following negatively affects the plant?
  • Insectisides
  • Pesticides
  • Fertilizers
  • All of the above
Ozone is present as a chief constituent in which region of the atmosphere?
  • Troposphere
  • Stratosphere
  • Mesosphere
  • Thermosphere
Which one of the following is mainly responsible for depletion of ozone layer?
  • Methane
  • Carbon dioxide
  • Water
  • Chlorofluorocarbons
What can reduce the use of pesticides?
  • Use of chemical fertilizers
  • No pest control
  • Growing of weed
  • Biological methods of pest control
The design, development and implementation of chemical products and process to reduce or eliminate the use and generation of substances hazardous to human health and environment is called ________ .
  • Green Revolution
  • Green Chemistry
  • Environmental Chemistry
  • Waste Management
Chlorofluorocarbons cause
  • Global warming
  • Eutrophication of lakes
  • Depletion of the ozone layer
  • Magnification in the food chain
  • Acid rain
Which of the following is the result of use of chlorofluorocarbons?
  • Global warming
  • Eutrophication of lates
  • Depletion of the ozone layer
  • Magnification in the food chain
  • Acid rain
Which of the following gas is used in bleaching of paper?
  • Hydrogen peroxide
  • Sulphur dioxide
  • Methane
  • None of the above
Chlorofluorocarbons have been in use in refrigerators and air conditioners are proved to be unfriendly to the environment. Substitutes to these compounds which are friendly to the environment are:
  • $$CCl_2$$
  • $$C{Cl}_3F$$
  • $$CClF_2CClF_2$$
  • $$CF_3CH_2F$$
Which of the following eliminates the species from a particular area?
I. Use of insecticides
II. Hunting of the species as prey
III. Habitat destruction
  • True
  • False
State True or False.
Use of herbicides and pesticides should be reduced to prevent soil pollution.
  • True
  • False
_______ or using plants (such as willow) to extract heavy metals can prevent soil pollution.
  • Phytoremediation
  • Biofertilizer
  • Bioremediation
  • None of above
Current commercial method for producing ibuprofen is a stunning application of Green chemistry because ______ .
  • ibuprofen is an anti-inflammatory drug and has various applications
  • the previous method required large amounts of solvents and generated large wastes compared to the current method
  • it has very important medicinal value
  • this compound has very less side effects after usage
Whenever practicable, synthetic methods should be designed to use and generate substances that are little or not toxic to human health and environment, is an objective of:
  • waste management
  • green chemistry
  • air pollution
  • green revolution
Agriculture can cause soil contamination due to:
  • accumulation of animal manures
  • illicit dumping of tainted crops on land
  • improper sanitation system
  • both A and B
To manufacture computer chips, many chemicals, large amounts of water, and energy are required which is harmful to environment. a process is discovered which significantly reduces the quantities of chemicals, energy, and water needed to produce chips. This is an application of:
  • Green chemistry
  • waste management
  • revolution resource recovery
  • Green revolution
Which of the following reactions does not occur in stratosphere?
  • $${ O }_{ 2 }+UV\longrightarrow O+O$$
  • $${ O }_{ 2 }+O\longrightarrow { O }_{ 3 }$$
  • $${ Cl }+{ O }_{ 3 }\longrightarrow { O }_{ 2 }+ClO$$
  • $$S{ O }_{ 3 }+{ H }_{ 2 }O\longrightarrow { H }_{ 2 }S{ O }_{ 4 }$$
Which of the following reaction occur when urea is added to soil as a fertilizer?
  • $$NH_{ 2 }CONH_{ 2 }\longrightarrow HNCO+NH_{ 3 }$$
  • $$N{ H }_{ 2 }CON{ H }_{ 2 }+{ H }_{ 2 }O\longrightarrow 2N{ H }_{ 3 }+C{ O }_{ 2 }$$
  • $$2NH_{ 2 }CONH_{ 2 }\longrightarrow H_{ 2 }NCONHCONH_{ 2 }+NH_{ 3 }$$
  • Both 1 and 2
______ or using fungus to metabolize contaminants and accumulate heavy metals.
  • Bioremediation
  • Phytoremediation
  • Both A and B
  • Mycoremediation
Plastics being developed from eco-friendly renewable sources, plus some modern plastics are biodegradable is one of the achievements of________.
  • Green revolution
  • Waste management
  • Revolution resource recovery
  • Green chemistry
Which of the following is an organic contaminant causing soil pollution?
  • Polynuclear aromatic hydrocarbons
  • Cadmium
  • Lead
  • Phosphates
A raw material feedstock should be renewable rather than depleting, whenever technically and ecomonically practical, is an objective of:
  • Green revolution
  • Green chemistry
  • waste management
  • revolution resource recovery
Which of the following products have green chemistry approach?
  • Ibuprofen
  • Surfactant
  • Propene
  • All of the above
Taking chromium and arsenic, which are toxic, out of pressure-treated wood, and using new less toxic chemicals for bleaching paper, are examples of _________.
  • Green chemistry
  • Green revolution
  • revolution resource recovery
  • waste management
Solvents used to dry clean clothes are usually $$C_2Cl_4$$ .A substitute has been discovered which is environmental friendly is an application of __________.
  • Green revolution
  • Green chemistry
  • Waste management
  • Revolution resource recovery
The decomposition of organic materials in soil can release sulfur dioxide and other sulfur compounds, causing:
  • bioremediation
  • acid rain
  • denitrification
  • none of above
Switching from air to pure oxygen eliminates the NO production. This is an application of:
  • Green chemistry
  • waste management
  • Green revolution
  • none of above
Plastic used to preserve yogurts is replaced with a polymer called polylactic acid is an example of _______.
  • green chemistry
  • waste management
  • green revolution
  • none of above
Biomass is used instead of extensive use of petroleum. This is an application of :
  • Green revolution
  • waste management
  • Green chemistry
  • revolution resource recovery
Faraday has developed a plating process to make high-performance chrome coatings from trivalent chromium instead of highly toxic hexavalent chromium. This is an application of:
  • Green revolution
  • Green chemistry
  • waste management
  • revolution resource recovery
Which layer of the atmosphere contains the ozone layer?
  • Stratosphere
  • Troposphere
  • Exosphere
  • Mesosphere
Waste management is ________.
  • to develop products and processes that are kind to the environment. This can involve reducing the waste a process creates, using renewable materials, lessening the energy required to form a product, etc
  • the collection, transportation, disposal or recycling and monitoring of waste
  • the process of creating a clean and green environment
  • None of above
Which of the following compounds are toxic?
  • Benzene
  • Toluene
  • Carbon tetrachloride
  • All of the above
Identify the harmful radiations emitted by the sun.
  • Ultra violet
  • Infra red
  • Visible
  • Radio waves
How much % of the atmosphere's mass is contained in the troposphere?
  • 20
  • 80
  • 50
  • 60
"Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up ___ of the atmosphere."
  • 21%
  • 22%
  • 23%
  • 24%
________ reduces toxicity, minimizes waste, saves energy, and cuts down on the depletion of natural resources. It allows for advances in chemistry to occur in a much more environmentally benign way.
  • Green chemistry
  • Green revolution
  • Waste management
  • None of the above
The current synthesis of poly-carbonate is an application of:
  • green revolution
  • green chemistry
  • waste management
  • none of above
Which of the following statements is/are correct for generating non-biodegradable waste?
  • Thermal power plants producing fly ash
  • Iron and steel plants producing blast furnace slag
  • Metal industries producing mud and tailings
  • All of the above
Among the following compounds, which one is not responsible for the depletion of ozone layer?
  • $$CH_4$$
  • $$CFCl_3$$
  • $$CHCl_3$$
  • $$Cl_2$$
Methods used for the management of waste is/are:
  • recycling
  • incineration
  • digesting
  • all of the above
Taj mahal is threatened by which atmospheric pollutant released by Mathura refinery?
  • $$SO_2$$
  • $$CO_2$$
  • $$CO$$
  • $$Cl_2$$
Paint is type of:
  • industrial waste
  • household waste
  • from kitchen
  • a contamination of water
Among the following, which gas can be used as a  fuel in the digesting process?
  • $$CO_2$$
  • $$CH_4$$
  • $$O_2$$
  • $$NO$$
Which of the following is a non-biodegradable pollutant?
  • DDT
  • Sewage
  • Plant leaves
  • Domestic wastes
Biodegradable wastes are deposited in land fills and are converted into ________.
  • compost
  • dust
  • pesticides
  • none of these
Temperature range ( K ) in stratosphere is:
  • 217--271
  • 271--181
  • 181--1473
  • None of these
$$Statement\ I-$$ Algal blooms, caused by phosphates, are beneficial to aquatic ecosystems.
BECAUSE
$$Statement\ II-$$ Algal blooms are associated with rapidly increasing rates of photosynthesis which lead to dissolve oxygen content in the water leading to much higher than normal levels.
  • Statement $$I$$ is true, Statement $$II$$ is true
  • Statement $$I$$ is true, Statement $$II$$ is false
  • Statement $$I$$ is false, Statement $$II$$ is true
  • Statement $$I$$ is false, Statement $$II$$ is false
  • Statement $$I$$ is true, Statement $$II$$ is true and is correct explanation of the phenomena described in $$I$$
Ozone in the stratosphere is depleted by
  • $$C_6F_6Cl_6$$
  • $$C_7F_{16}$$
  • $$CF_2Cl_2$$
  • $$C_6F_6$$
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