Tag: for a pollution free nature

Questions Related to for a pollution free nature

Sewage is waste water released by:

chemistry water too little to waste effects and conservation of water pollution water pollution, its effects and cures for a pollution free nature

  1. homes

  2. industries, hospitals

  3. offices and other users

  4. all of the above

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Correct Option: D
Explanation:

Sewage in wastewater is released by homes, factories, industries, hospitals, offices, and other uses. These mainly occur in developing countries where people don't have access to sanitary conditions and clean water. Untreated sewage can contaminate the environment and cause disease such as diarrhoea. 

Distilled water is clean and pure water, but unfit for human consumption.

chemistry water too little to waste effects and conservation of water pollution water pollution, its effects and cures for a pollution free nature

  1. True

  2. False

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Correct Option: A
Explanation:

Drinking distilled water robs your body of its natural source for many minerals essential to good health. This results in a mineral loss in the body with increase your risk for osteoporosis, hypertension, osteoarthritis etc.

500 ml of a sample COD of water required 19.6 mg of $ K _2Cr _2O _7 $ of water sample is

chemistry water too little to waste effects and conservation of water pollution water pollution, its effects and cures for a pollution free nature

  1. 9 PPM

  2. 8PPM

  3. 16.8 PPM

  4. 10 PPM

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Correct Option: B

The day-to-day condition of the atmosphere at a place with respect to the _______ is called the weather at that place.

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. temperature

  2. humidity, rainfall

  3. wind-speed

  4. all of the above

Show answer
Correct Option: D
Explanation:

The day to day condition of the atmosphere at a place with respect to $temperature, humidity, rainfall\, and\, wind-speed$ are called the weather at that place.

Which gas is emitted by the combustion of fossil fuels?

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. $CO _2$

  2. $SO _2$

  3. $H _2S$

  4. $NO _2$

Show answer
Correct Option: A
Explanation:

Carbon dioxide is the major gas along with smaller amounts of methane and nitrous oxide which are emitted by the combustion of fossil fuels such as coal, oil, and natural gas and contribute to the major green house gases.

So, the correct answer is option A.

What are the effects of air pollution?


i. greenhouse effect
ii. smog
iii. respiratory disease
iv. acid rain

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. i,ii, iii

  2. ii, iii, iv

  3. iii, iv, i

  4. i, ii, iii, iv

Show answer
Correct Option: D
Explanation:

Effects of Air Pollution are greenhouse effect, smog, deforestation and acid rains.

Causes of air pollution are:
i. Exhaust from automobiles
ii. Exhaust from factories and power plant
iii. CFCs
iv. Polythene

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. i, ii, iii

  2. ii, iii, iv

  3. iii, iv, i

  4. i, ii, iv

Show answer
Correct Option: A
Explanation:

Causes of Air pollution are

  • Exhaust from automobiles
  • Exhaust from factories 
  • Power plant
  • CFCs.

Air pollution takes place in two different layers of the earth's atmosphere :_______.

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. troposphere and stratosphere

  2. mesosphere and troposphere

  3. stratosphere and hydrosphere

  4. troposphere and hydrosphere

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Correct Option: A
Explanation:

Air pollution takes place in two different layers of the earth's atmosphere : troposphere and stratosphere.

Which gas is released by improper or incomplete combustion and are generally emitted from vehicles?

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. $SO _2$

  2. $CO$

  3. $NO$

  4. $CO _2$

Show answer
Correct Option: B
Explanation:

Carbon Monoxide is formed by improper or incomplete combustion and is generally emitted from vehicles. 

Major pollutant of air is:

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. $SO _2$

  2. $NO _2$

  3. both A and B

  4. $CFC$s

  5. all of the above

Show answer
Correct Option: E
Explanation:

$SO _2, \ NO _2 $ & $ CFC $, all cause air pollution.