Tag: recycling

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Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

The common bleaching agent of recycled paper is

  1. Hydrogen peroxide

  2. Sodium hydrosulfite

  3. Chlorine

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Paper recycling is a process wherein, the paper that is used, discarded by the consumer, is collected and transported to paper mills. The papers are mixed with water and chemicals, broken down, converted into paper pulp and transformed into reusable form. The pulp which is obtained is colored and bleaching is performed to remove the color. The chemicals which are used for bleaching are hydrogen peroxide, sodium hydrosulfite or sodium dithionite. These chemicals helps in deinking of the pulp and increasing brightness. 
Thus, the correct answer is option D.
Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

During paper recycling, .......... is used to bleach pulp.

  1. Bleaching powder

  2. Hydrogen peroxide

  3. Water

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Paper recycling is a process wherein, the paper that is used, discarded by the consumer, is collected and transported to paper mills. The papers are mixed with water and chemicals, broken down, converted into paper pulp and transformed into reusable form. The pulp is colored and bleaching is performed to remove the color. The chemicals which are used for bleaching are hydrogen peroxide, sodium hydrosulfite or sodium dithionite. These chemicals help in deinking of the pulp and increasing brightness. 

Thus, the correct answer is option B. 

Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Non-biodegradable pollutants are created by 

  1. Nature

  2. Excessive use of resources

  3. Humans

  4. Natural disasters
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Non-biodegradable pollutants refer to toxic pollutants that are not degraded or decomposed naturally into less harmful compounds. Humans are the primary source of producing non-biodegradable pollutants. These pollutants include heavy metals such as arsenic, mercury and lead, polythene, synthetic fibres and DDT (dichloro-diphenyl-trichloroethane).

So, the correct answer is 'Humans'.

Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Plastic is one of the most harmful .......... waste.

  1. Biodegradable

  2. Non biodegradable

  3. Biotic

  4. Abiotic
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The substance which can be easily decomposed by natural decomposers is called as biodegradable wastes such as humans and animal excreta, plant wastes. Whereas the substance that cannot be decomposed by the natural decomposers and harm the environment is called as non biodegradable such as plastics, nuclear wastes or radioactive wastes, chemical wastes like DDT. Abiotic is the nonliving component of the ecosystem which consists air, water sunlight etc. Biotic is the component of an ecosystem which consists all living things like animals and plants. Thus, the correct answer is option B.

Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Which one is non-biodegradable?

  1. DDT

  2. Sewage

  3. Livestock waste

  4. Market garbage
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A. Dichlorodiphenyltrichloroethane or DDT is a crystalline, colourless and odourless compound which is used as an insecticide.
B. Sewage is the wastewater which is generated from the homes and factories.
C. Livestock waste is generated from livestock industries of meat, egg and milk.
D. Market garbage is the rubbish stuff produced from various factories and industries.
Out of all these options, DDT is non-biodegradable which means that it cannot be degraded by the action of microbes.
So, the correct answer is 'DDT'.
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

All materials are not recycled in the environment.

  1. True

  2. False

  3. Either

  4. Neither
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Many elements are recycled in nature through biogeochemical cycles. For example, carbon, hydrogen, nitrogen, sulphur etc. Biogeochemical cycles are also known as nutrient cycles. Through these cycles, there is exchange or circulation of nutrients between biotic and abiotic components of biosphere. The elements are provided to organisms by the earth and after their death and decay, the elements are returned to earth again.However, plastics, glass, synthetic fibres etc are not recycled in the environment
Hence, the statement given in the question is correct.
So, the correct answer is 'True'
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Biodegradable wastes should be separated and kept in blue colour bins for garbage collectors.

  1. True

  2. False

  3. Either

  4. Neither
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Biodegradable wastes can be decomposed by the action of microbes. They are kept in green coloured bins for garbage collectors. Green bins are meant for collecting wet waste such as kitchen waste, fruit peels, food items etc. Blue coloured bins are meant for collecting dry waste which include plastic items, glass jars, metal cans, paper bags, polybags etc. which can be recycled or reused. 
Hence, the statement given in the question is incorrect.
So, the correct answer is 'False'. 
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

In the following groups of materials, which group(s) contains only non-biodegradable items?

  1. wood, paper, leather

  2. polythene, detergent, PVC

  3. plastic, detergent, grass

  4. plastic, bakelite, DDT
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Explanation
Non-biodegradable substances are the substances that can't be decomposed or degraded into simpler molecules by the action of microbes. Therefore these substances remain in nature for a long period of time. These include polythene, detergent, PVC (Polyvinyl chloride, a synthetic polymer of plastic) plastic, bakelite, DDT (a pesticide) etc.
Biodegradable substances can be decomposed into simpler molecules by the action of microbes. These include wood, paper, leather, grass etc.
So, the correct answer is option B and D.
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Multiple Choice Questions
Which one is non biodegradable

  1. sewage

  2. market garbage

  3. liverstock waste

  4. DDT
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
DDT (dichlorodiphenyltrichloroethane) is a colorless and crystalline organochlorine known for its insecticidal properties.  It is nonbiodegradable and tends to accumulate and magnify in amount due to subsequent uses posing grave environmental impacts.
So, the correct answer is option D, DDT.
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Non - biodegradable substances are the one which_________________

  1. Do not degrade

  2. Degrades efficiently

  3. Degrades very slowly

  4. Remains unharmed
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Non-Biodegradable wastes are those that cannot break down or degrade for many years. These are waste that cannot change into manure and they pile up causing pollution. Burning these fuels causes more pollution in the environment. The non-biodegradable wastes become useful when they can be recycled.

So the correct option is 'Do not degrade'.