CBSE Questions for Class 8 Chemistry Pollution Of Air And Water Quiz 9 - MCQExams.com

Which of the following pose threat to historical monument Taj Mahal?
  • Floods in Yanuna river
  • Temperature mediated spoilage of marble
  • Air pollutants from Mathura refinery
  • All of the above
Which of them can help in controlling water pollution?
  • Use the minimum amount of detergent and/or bleach when you are washing clothes or dishes
  • Minimize the use of pesticides, herbicides, fertilizers. Do not dispose of chemicals, motor oil, or other automotive fluids into the sanitary sewer or storm sewer systems
  • Avoid using the toilet as a wastebasket
  • All of the above
Which one of these gases is not a greenhouse gas?
  • $$CO_2$$
  • $$CH_4$$
  • $$H_2O$$
  • $$NO_2$$
What can we do to save water?
  • Reduce, reuse, recycle
  • Cooling
  • Filtration
  • None of above
Greenhouse gases are those that can absorb and emit infrared radiation. Which of the following is not a greenhouse gas?
  • Water vapour
  • Carbon Dioxide
  • Methane
  • Hydrogen
Which of the following initiative was launched for cleaning the Ganga river?
  • National Mission for Clean Ganga
  • National Mission for Clean Gange
  • National Mission for Cleaning Ganga
  • None of the above
A technique used to determine the concentration of odour compounds in a sample is known as:
  • Stripping
  • Chlorination
  • Flushing
  • Settling
The greenhouse gas is:
  • $$CO_2$$
  • $$SO_2$$
  • $$N_2$$
  • $$ H_2 S $$
Most abundant water pollutant is
  • Detergents
  • Industrial wastes
  • Pesticides
  • Oil spills
Oil refineries, paper factories, textile and sugar mills, chemical factories are responsible for water pollution. These industries discharge harmful chemicals into rivers and streams and pollute water. The chemicals released include ________.
  • arsenic
  • lead
  • fluorides
  • all of the above
For drinking purpose, water should be tested for _______________.
  • fluoride
  • lead
  • sulphate
  • nitrate
Compound used to remove bacteria from water is:
  • washing soda
  • baking soda
  • alum
  • bleaching powder
Which of the following is not greenhouse gas?
  • Water vapor
  • $$CO_2$$
  • Methane
  • Nitrogen
Increased level of greenhouse gases causes global warming which will result in:
  • Temperature may rise by the more then two degree Celsius
  • Melting of glaciers
  • both A  and B
  • None of these
Identify the non-Green House Gas (GHG) from the following:
  • Methane
  • Nitrous oxide
  • Sulphur hexafluoride
  • Carbon monoxide
Which of the following gases is not a greenhouse gas?
  • Oxygen
  • Methane
  • Nitrous oxide
  • Water vapour
Which of the following industries are responsible for water pollution?
  • Oil refineries
  • Chemical factories
  • Textile and sugar mills
  • All of these
Which of the following is not a greenhouse gas?
  • Hydrogen
  • Carbon dioxide
  • Methane
  • Nitrous oxide
Which of the following is a set of green house gases?
  • $$CH_4, O_3, N_2, SO_2$$
  • $$O_3,N_2,CO_2,NO_2$$
  • $$O_3,NO_2,SO_2,Cl_2$$
  • $$CO_2,CH_4,N_2O,O_3$$
Fish die in water bodies polluted by sewage due to:
  • large number of mosquitoes
  • increase in the amount of dissolved oxygen
  • decrease in the amount of dissolved oxygen in water
  • None of these
The gases associated with the green house effect is:
  • Carbon dioxide
  • Oxygen
  • Methane
  • Both A and C
Global warming is due to greenhouse effect. The greenhouse gas include:
  • $$CO_2$$
  • Methane
  • Both a & b
  • Chlorine
Simple inorganic substances released into environment is reused by ______.
  • Pyrolysis reactor
  • Pyrolysis chamber
  • Simple reactor
  • Simple chamber
The most abundant greenhouse gas in the earth's atmosphere:
  • Carbon dioxide $$(CO_{2})$$
  • Nitrous oxide $$(N_{2}O)$$
  • Water vapor $$(H_{2}O)$$
  • Methane $$(CH_{4})$$
Which of the following is not directly responsible for causing water pollution?
  • Automobile exhaust
  • Garbage
  • Untreated sewage,
  • Non-biodegradable polythene bags
Which one is not correct regarding greenhouse effect?
  • is due to high concentration of $$CO_2$$ in atmosphere
  • is influenced by gases such as $$CH_4, H_2O$$ vapor, and chlorofluorocarbons
  • would result in the warming up of the earth
  • would result in lowering the level of oceans due to high evaporation.
Water must be purified before it is suitable for use in the home. Which processes are used to remove solid impurities and to kill bacteria?
  • To remove solid impurities - chlorination, to kill bacteria - chlorination
  • To remove solid impurities - chlorination, to kill bacteria - filtration
  • To remove solid impurities - filtration, to kill bacteria - chlorination
  • To remove solid impurities - filtration, to kill bacteria - filtration
Fluorosis, a bone disease is caused by the presence of :
  • Pesticides in water
  • Fluorides in water
  • Carbon monoxide in air
  • Sulphur dioxide in air
Taj Mahal is threatened due to effect of :
  • chlorine
  • sulphur dioxide
  • oxygen
  • hydrogen
Carbon dioxide is one of the greenhouse gas.
  • True
  • False
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