NEET Biology Environmental Issues MCQs Set 06

Practice MCQs for NEET Biology Environmental Issues

Access targeted multiple-choice questions for Environmental Issues designed to align with the latest NEET academic syllabus for NEET Biology. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

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Multiple Choice Questions

Question 1: Domestic sewage primarily contains –
(a) Suspended solid
(b) Colloidal matter
(c) Biodegradable matter
(d) Dissolved matter
Show Answer & Explanation

Answer: (c) Biodegradable matter

Explanation:
1. Domestic sewage primarily contains biodegradable organic matter.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 2: About highly sewage polluted water, what is true –
(a) High DO and BOD
(b) High DO and less BOD
(c) Low DO and low BOD
(d) Low DO and high BOD
Show Answer & Explanation

Answer: (d) Low DO and high BOD

Explanation:
1. Sewage polluted water has low dissolved oxygen and high BOD because microbes use up oxygen.

Teacher's Note:
1. Domestic sewage is mainly biodegradable organic matter; polluted water has high BOD and low dissolved oxygen, and biomagnification occurs for DDT and mercury.
2. Accelerated ageing of lakes by nutrient enrichment is cultural eutrophication; the Arcata marsh treatment uses six connected marshes with plants, algae, fungi and bacteria.

Question 3: Biomagnification - an increase in concentration of toxic substances at successive trophic levels, is well known for –
(a) DDT
(b) Mercury
(c) CO
(d) Both (1) and (2)
Show Answer & Explanation

Answer: (d) Both (1) and (2)

Explanation:
1. DDT and mercury both biomagnify along the food chain.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 4: Pollutants from man’s activities like effluents from industries and homes can radically accelerate the aging of lake, that is known as –
(a) Cultural Eutrophication
(b) Accelerated Eutrophication
(c) Rising Eutrophication
(d) Both (1) & (2)
Show Answer & Explanation

Answer: (d) Both (1) & (2)

Explanation:
1. Accelerated ageing of a lake by human activities is cultural or accelerated eutrophication.

Teacher's Note:
1. Domestic sewage is mainly biodegradable organic matter; polluted water has high BOD and low dissolved oxygen, and biomagnification occurs for DDT and mercury.
2. Accelerated ageing of lakes by nutrient enrichment is cultural eutrophication; the Arcata marsh treatment uses six connected marshes with plants, algae, fungi and bacteria.

Question 5: Integrated waste water treatment plant of town of Arcata is supported by biologists of Humboldt state university, involves –
(a) Conventional sedimentation
(b) Filteration
(c) Series of six marshes
(d) All the above
Show Answer & Explanation

Answer: (d) All the above

Explanation:
1. The Arcata plant uses conventional sedimentation and filtration followed by a series of six marshes.

Teacher's Note:
1. Ozone is measured in Dobson units; CFC releases chlorine in the stratosphere, and the Montreal Protocol (1987) controls ozone depleting substances; UV-B causes skin cancer and cornea inflammation.
2. National Forest Policy (1988) recommends 33 per cent forest cover; joint forest management (1980s) involves local communities, with the Chipko movement and Amrita Devi's Bishnoi sacrifice as examples.

Question 6: Series of six connected marshes over 60 hectares of marshland, with appropriate plants, algae, fungi and bacteria is responsible for –
(a) Neutrilisation of pollutants
(b) Absorbtion of pollutants
(c) Assimillation of pollutants
(d) All the above
Show Answer & Explanation

Answer: (d) All the above

Explanation:
1. The marshes with plants, algae, fungi and bacteria neutralise, absorb and assimilate pollutants.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 7: Open dumps often serve as breeding ground for rats and flies and not burnt to completion. Which among the following were adopted as the substitute for open burning dumps –
(a) Eco san
(b) Electronic Burners
(c) Sanitary Landfills
(d) Solar Burners
Show Answer & Explanation

Answer: (c) Sanitary Landfills

Explanation:
1. Sanitary landfills replaced open burning dumps.

Teacher's Note:
1. Domestic sewage is mainly biodegradable organic matter; polluted water has high BOD and low dissolved oxygen, and biomagnification occurs for DDT and mercury.
2. Accelerated ageing of lakes by nutrient enrichment is cultural eutrophication; the Arcata marsh treatment uses six connected marshes with plants, algae, fungi and bacteria.

Question 8: Which among the following was developed by company of Ahmed Khan by a fine powder of recycled modified plastic –
(a) Polysterene
(b) Polyblend
(c) Polyethylene
(d) Polyplastic
Show Answer & Explanation

Answer: (b) Polyblend

Explanation:
1. Ahmed Khan's company made polyblend, a fine powder of recycled modified plastic.

Teacher's Note:
1. Ozone is measured in Dobson units; CFC releases chlorine in the stratosphere, and the Montreal Protocol (1987) controls ozone depleting substances; UV-B causes skin cancer and cornea inflammation.
2. National Forest Policy (1988) recommends 33 per cent forest cover; joint forest management (1980s) involves local communities, with the Chipko movement and Amrita Devi's Bishnoi sacrifice as examples.

Question 9: With which polyblend was mixed to lay roads. Which show increased water repellant properties –
(a) Polysterene
(b) Bitumen
(c) Polyethylene
(d) Plastic
Show Answer & Explanation

Answer: (b) Bitumen

Explanation:
1. Polyblend is mixed with bitumen to lay roads with increased water repellence.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 10: e - wastes generated in developed countries, is used by developing countries for recovery of –
(a) Gold
(b) Nickel
(c) Copper
(d) All the above
Show Answer & Explanation

Answer: (d) All the above

Explanation:
1. Informal recyclers in developing countries recover gold, nickel, copper and other metals from e-waste.

Teacher's Note:
1. Domestic sewage is mainly biodegradable organic matter; polluted water has high BOD and low dissolved oxygen, and biomagnification occurs for DDT and mercury.
2. Accelerated ageing of lakes by nutrient enrichment is cultural eutrophication; the Arcata marsh treatment uses six connected marshes with plants, algae, fungi and bacteria.

Question 11: Which among the following is a cyclical, zero waste procedure, where waste products from one process are cycled in as nutrients for other processes–
(a) Integrated organic farming
(b) Integrated remedy for plastic waste
(c) Integrated waste water treatment
(d) Sustainable waste treatment
Show Answer & Explanation

Answer: (a) Integrated organic farming

Explanation:
1. Integrated organic farming is a cyclical, zero waste process in which wastes of one process become nutrients for another.

Teacher's Note:
1. Ozone is measured in Dobson units; CFC releases chlorine in the stratosphere, and the Montreal Protocol (1987) controls ozone depleting substances; UV-B causes skin cancer and cornea inflammation.
2. National Forest Policy (1988) recommends 33 per cent forest cover; joint forest management (1980s) involves local communities, with the Chipko movement and Amrita Devi's Bishnoi sacrifice as examples.

Question 12: The unique idea of integrated organic farming was executed by–
(a) Ramesh Chandra Dagar
(b) Ahmed Khan
(c) Amrita Devi
(d) Sunderlal Bahuguna
Show Answer & Explanation

Answer: (a) Ramesh Chandra Dagar

Explanation:
1. Ramesh Chandra Dagar, a farmer from Sonepat, executed integrated organic farming.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 13: Green house effect leads to deleterious changes in the environment and resulting in odd climatic changes. Which among the following is not the control measure of it –
(a) Cutting down the use of fossil fuel
(b) Improving efficiency of energy usage
(c) Increasing deforestration
(d) Slowing down the human population
Show Answer & Explanation

Answer: (c) Increasing deforestration

Explanation:
1. Increasing deforestation would aggravate the greenhouse effect, so it is not a control measure.

Teacher's Note:
1. Domestic sewage is mainly biodegradable organic matter; polluted water has high BOD and low dissolved oxygen, and biomagnification occurs for DDT and mercury.
2. Accelerated ageing of lakes by nutrient enrichment is cultural eutrophication; the Arcata marsh treatment uses six connected marshes with plants, algae, fungi and bacteria.

Question 14: The thickness of the ozone in a column of air from ground to top of the atmosphere is measured in terms of –
(a) Decibel
(b) Dobson
(c) Deby
(d) Dalton
Show Answer & Explanation

Answer: (b) Dobson

Explanation:
1. The thickness of the ozone column is measured in Dobson units.

Teacher's Note:
1. Ozone is measured in Dobson units; CFC releases chlorine in the stratosphere, and the Montreal Protocol (1987) controls ozone depleting substances; UV-B causes skin cancer and cornea inflammation.
2. National Forest Policy (1988) recommends 33 per cent forest cover; joint forest management (1980s) involves local communities, with the Chipko movement and Amrita Devi's Bishnoi sacrifice as examples.

Question 15: Cl atoms released from CFC show degradation of ozone in which layer of atmoshpere –
(a) Trophosphere
(b) Stratosphere
(c) Ionosphere
(d) Thermosphere
Show Answer & Explanation

Answer: (b) Stratosphere

Explanation:
1. Chlorine atoms released from CFCs destroy ozone in the stratosphere.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 16: Which among the following is not the influence of UV-B on human health –
(a) Aging of skin
(b) Inflammation of cornea
(c) Cancer of skin
(d) Depigmentation
Show Answer & Explanation

Answer: (d) Depigmentation

Explanation:
1. UV-B causes skin ageing, cornea inflammation and skin cancer; depigmentation is not listed among its effects.

Teacher's Note:
1. Domestic sewage is mainly biodegradable organic matter; polluted water has high BOD and low dissolved oxygen, and biomagnification occurs for DDT and mercury.
2. Accelerated ageing of lakes by nutrient enrichment is cultural eutrophication; the Arcata marsh treatment uses six connected marshes with plants, algae, fungi and bacteria.

Question 17: Montreal Protocol was come in action from –
(a) 1987
(b) 1988
(c) 1989
(d) 1992
Show Answer & Explanation

Answer: (c) 1989

Explanation:
1. The Montreal Protocol, signed in 1987, came into effect in 1989.

Teacher's Note:
1. Ozone is measured in Dobson units; CFC releases chlorine in the stratosphere, and the Montreal Protocol (1987) controls ozone depleting substances; UV-B causes skin cancer and cornea inflammation.
2. National Forest Policy (1988) recommends 33 per cent forest cover; joint forest management (1980s) involves local communities, with the Chipko movement and Amrita Devi's Bishnoi sacrifice as examples.

Question 18: The ozone hole over Antarctica develops each year between –
(a) Late August and early October
(b) Early August and late October
(c) Early October and early December
(d) Late October and late December
Show Answer & Explanation

Answer: (a) Late August and early October

Explanation:
1. The Antarctic ozone hole develops each year between late August and early October.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 19: Slash and Burn agriculture are associated with –
(a) Deforestration
(b) Jhum cultivation
(c) Shifting cultivation
(d) All the above
Show Answer & Explanation

Answer: (d) All the above

Explanation:
1. Slash and burn agriculture, jhum and shifting cultivation all cause deforestation.

Teacher's Note:
1. Air pollution control: electrostatic precipitators remove over 99 per cent of particulate matter, scrubbers remove gases such as SO2, and catalytic converters change unburnt hydrocarbons, CO and NOx to CO2, water, and N2 (they need unleaded petrol).
2. Delhi reduced vehicular pollution by CNG buses after the Supreme Court order; Bharat Stage norms follow Euro norms.

Question 20: Realising the significance of participation by local communities, the goverment of India in 1980s has introduced the concept of –
(a) Integrated Forest Management [IFM]
(b) Joint forest management [JFM]
(c) National Forest Policy
(d) Chipko movement
Show Answer & Explanation

Answer: (b) Joint forest management [JFM]

Explanation:
1. Joint forest management was introduced in the 1980s to involve local communities.

Teacher's Note:
1. Ozone is measured in Dobson units; CFC releases chlorine in the stratosphere, and the Montreal Protocol (1987) controls ozone depleting substances; UV-B causes skin cancer and cornea inflammation.
2. National Forest Policy (1988) recommends 33 per cent forest cover; joint forest management (1980s) involves local communities, with the Chipko movement and Amrita Devi's Bishnoi sacrifice as examples.

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Multiple Choice Questions (MCQs) for NEET Biology Environmental Issues

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FAQs

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