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Environment mcq UPSC. We covered all the Environment mcq UPSC in this post for free so that you can practice well for the exam.
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mcq on Environment for UPSC Students
The increasing build-up of non-biodegradable pesticides in Organisms across successive trophic levels is known as
(a) Eutrophication
(b) Pollution
(c) Biomagnification
(d) Accumulation
Option c – Biomagnification
Which one of the following items can decompose naturally?
(a) Plastic mugs
(b) Leather belts
(c) Silver foil
(d) Iron nails
Option b – Leather belts
Which among the following is not biodegradable?
(a) Wool
(b) Nylon
(c) Animal bones
(d) Tea leaves
Option b – Nylon
Identify the item that doesn’t belong to the group
(a) Newspaper
(b) Glass bottles
(c) Pesticides
(d) Polythene bags
Option a – Newspaper
Which options involve biological waste treatment methods?
(a) Bioplastics
(b) Making compost from Organic waste
(c) Using microbes to clean polluted areas
(d) All of these
Option d – All of these
What is the impact of burning coal and petroleum?
(a) Contributes to global warming
(b) Releases carbon dioxide
(c) Both (a) and (b)
(d) Neither of the above
Option c – Both (a) and (b)
An ecosystem contains
(a) A single linear Food chain starting with producers
(b) A web of interconnected Food chains
(c) Distinct Food chains without links between land and water systems
(d) None of these
Option b – A web of interconnected Food chains
The full name of the biocide BHC, known for increasing toxin levels through the Food chain, is
(a) Beta Hepto Chloride
(b) Benzene Hepto Carbonate
(c) Benzene Hexachloride
(d) Beta Hexa Carbonate
Option c – Benzene Hexachloride
Which among the following is an environmentally responsible behavior?
(a) Using reusable cloth bags while shopping
(b) Turning off appliances when not in use
(c) Walking instead of using motor vehicles
(d) All of the above
Option d – All of the above
Among the following, which pollutant is most hazardous?
(a) Carbon monoxide
(b) Sulfur dioxide
(c) Nitrogen dioxide
(d) Carbon dioxide
Option a – Carbon monoxide
What substance has been responsible for the corrosion of the Taj Mahal?
(a) Carbon dioxide
(b) Sulfur dioxide
(c) Lead particles
(d) Radioactive materials
Option b – Sulfur dioxide
In a Food chain involving plants, birds, fish, and humans, which level will contain the highest toxin concentration?
(a) Green plants
(b) Humans
(c) Birds
(d) Fish
Option b – Humans
Why are green plants typically the first stage in Food chains?
(a) They exist in large numbers
(b) They are anchored in the soil
(c) They produce Food using sunlight
(d) Herbivores outnumber carnivores
Option c – They produce Food using sunlight
Which statement about Food chains and energy flow is incorrect?
(a) A food web consists of multiple food chains
(b) Any non-producer is a consumer
(c) A single species can feed across different trophic levels
(d) Decomposers feed at all levels except the producer level
Option d – Decomposers feed at all levels except the producer level
Choose the correct sequence of Organisms in a natural food chain
(a) Producer → Consumer → Decomposer
(b) Producer → Decomposer → Consumer
(c) Consumer → Producer → Decomposer
(d) Decomposer → Producer → Consumer
Option a – Producer → Consumer → Decomposer
Which of these will break down the fastest in nature?
(a) Mango seed
(b) Wood
(c) Mango peel
(d) Mango pulp
Option d – Mango pulp
In any ecosystem, herbivores act as
(a) Producers
(b) Primary consumers
(c) Secondary consumers
(d) Decomposers
Option b – Primary consumers
A trophic level in an ecosystem signifies the
(a) Oxygen level
(b) Water level
(c) energy level
(d) Salinity level
Option c – energy level
Choose the biodegradable item
(a) Plastic
(b) Steel
(c) Paper
(d) Copper wires
Option c – Paper
One of these gases does not enhance the greenhouse effect
(a) CFCs
(b) Carbon dioxide
(c) Oxygen
(d) Nitrous oxide
Option c – Oxygen
What is the Molecular formula of ozone?
(a) CFCs
(b) O₂O
(c) O₃
(d) Both (b) and (c)
Option c – O₃
UV rays from sunlight are dangerous because
(a) They can lead to skin cancer
(b) They can cause genetic mutations
(c) They may harm the eyes
(d) All of the above
Option d – All of the above
Which of these is not a cause of ozone layer depletion?
(a) CFCs
(b) Oxygen
(c) Carbon tetrachloride
(d) Methyl chloroform
Option d – Methyl chloroform
We covered all the Environment mcq UPSC above in this post for free so that you can practice well for the exam.
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