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Water too little to waste - class-VIII

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Dysentery and cholera are caused by drinking polluted water.

  1. True

  2. False


Correct Option: A
Explanation:

Contaminated water can cause many types of diarrheal diseases, including cholera, and other serious illness such as guinea worm diseases, typhoid, and dysentery.

Water pollution is the second most imperative environmental concern along with ____ pollution.

  1. noise

  2. air

  3. soil

  4. none of the above


Correct Option: B
Explanation:

Water pollution is the second most imperative environmental concern along with air pollution.

Industrial or man-made concentrations of naturally occurring substances, such as_____ and _____ have also been identified as health hazards in soil and groundwater.

  1. Carbon and ammonia

  2. Ammonia and nitrates

  3. Oxides and ammonia

  4. Carbon and nitrates


Correct Option: B
Explanation:

Industrial or man-made concentrations of naturally occurring substances, such as nitrate and ammonia associated with livestock manure from agricultural operations, have also been identified as health hazards in soil and groundwater.

Chronic exposure to ______ at sufficient concentrations is known to be associated with higher incidence of leukemia.

  1. sodium

  2. benzene

  3. methane

  4. all of above


Correct Option: B
Explanation:

Contaminated or polluted soil directly affects human health through direct contact with soil, or via inhalation of soil contaminants which have vaporized. Chronic exposure to benzene at sufficient concentrations is known to be associated with higher incidence of leukemia. 

Industrial pollution effects ______.

  1. air pollution

  2. water pollution

  3. land pollution

  4. all of the above


Correct Option: D
Explanation:

Any form of pollution that can trace its immediate source to industrial practices is known as industrial pollution.
Industrial pollution takes on many faces. It contaminates many sources of drinking water, releases unwanted toxins into the air and reduces the quality of soil all over the world

The contamination of the environment by businesses, particularly plants and factories, that dump waste products into the air and water is called __________.

  1. soil pollution

  2. industrial pollution

  3. radioactive pollution

  4. visual pollution


Correct Option: B
Explanation:

Industrial pollution is the contamination of the environment by businesses, particularly plants and factories, that dump waste products into the air and water. Industrial waste is one of the largest contributors to the global pollution problem endangering people and the environment.

Rain that has been made acidic by certain pollutants in the air due to industries is called _______ 

  1. Smog

  2. Acid rain

  3. Hazardous rain

  4. none of the above


Correct Option: B
Explanation:

Acid rain is the rainfall made so acidic by atmospheric pollution that it causes environmental harm, chiefly to forests and lakes. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulphur and nitrogen oxides which combine with atmospheric water to form acids.

Which of them are bio-degradable waste?

  1. Cow dung

  2. Animal bones

  3. Paper

  4. All of them


Correct Option: D
Explanation:

Those waste materials which can be broken down to non-poisonous substances in nature in due course of time by the action of micro-organisms like certain bacteria, are called biodegradable waste. 
Cattle dung and compost are common examples of biodegradable waste. Other examples are animal bones, leather, tea leaves, wool, paper and wheat.

Damage to the great taj mahal is caused by _________.

  1. soil pollution

  2. acid rain

  3. thermal radiations

  4. none of the above


Correct Option: B
Explanation:

Taj Mahal is situated in Agra. The air in this place contains serious levels of sulphur and nitrogen oxides. This is due to the large number of power plants and industries set up around this area. All these led to acid rain. Acid rain reacted with the marble (calcium carbonate) of Taj Mahal. This caused damage to this wonderful structure, which had attracted many people from different parts of the world.

Mining, deforestation, and utilization of water resources for industrial production leads to ______.

  1. wild life extinction

  2. thermal pollution

  3. both of them

  4. none of the above


Correct Option: A
Explanation:

Mining, deforestation, and utilization of water resources for industrial production have destroyed natural habitats and forced organisms to move further into the wild, exposing them to predators and intolerable living conditions. Consequently, some wildlife species have faced extinction while several others remain highly endangered.

Particulate pollutants are created by:

  1. industrial pollution

  2. water pollution

  3. global warming

  4. none of the above


Correct Option: A
Explanation:

Particulates pollutants are the minute solid particles or liquid droplets in air. These are present in vehicle emissions, smoke particles from fires, dust particles and ash from industries.

Industrialisation resulted in loss of what percentage of forests?

  1. 9.3%

  2. 3.9%

  3. 19.3%

  4. 13.9%


Correct Option: A
Explanation:

Due to industrialization which is a human activity $9.3$% of the forest is lost. In order to build new industries, flats, houses; trees are cut, thousands in numbers due to which there is a loss of forest.

Jaundice, diarrhoea etc., are caused due to the consumption of impure water.

  1. True

  2. False


Correct Option: A
Explanation:

Impure water contains lots of germs or bacteria. Waterborne diseases are caused by drinking contaminated or dirty water. Contaminated water can cause many types of diarrhea diseases, including cholera, and other serious illness such as gulnea worm diseases, typhoid, and dysentery.

Acid rain is the outcome of ________

  1. Land pollution

  2. Industrial pollution

  3. water pollution

  4. none of the above


Correct Option: B
Explanation:

Acid rain refers to a mixture of deposited material, both wet and dry, coming from the atmosphere containing more than normal amounts of nitric and sulfuric acids. Simply put, it means rain that is acidic in nature due to the presence of certain pollutants in the air due to cars and industrial processes. 

Sewage is waste water released by:

  1. homes

  2. industries, hospitals

  3. offices and other users

  4. all of the above


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.

  1. True

  2. False


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

  1. 9 PPM

  2. 8PPM

  3. 16.8 PPM

  4. 10 PPM


Correct Option: B
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