Test: Our Environment - 4


25 Questions MCQ Test General Science for UPSC (Civil Services) Prelims | Test: Our Environment - 4


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This mock test of Test: Our Environment - 4 for UPSC helps you for every UPSC entrance exam. This contains 25 Multiple Choice Questions for UPSC Test: Our Environment - 4 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Our Environment - 4 quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this Test: Our Environment - 4 exercise for a better result in the exam. You can find other Test: Our Environment - 4 extra questions, long questions & short questions for UPSC on EduRev as well by searching above.
QUESTION: 1

Which of the following is non-biodegradable ?

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QUESTION: 2

“Nitrous oxide is a green house gas” the above statement is-

Solution:

Nitrous oxide has an atmospheric lifetime of 110 years. The process that removes nitrous oxide from the atmosphere also depletes ozone. So nitrous oxide is not only a greenhouse gas, but also an ozone destroyer. Nitrous oxide (or N2O), is more commonly known as laughing gas.

QUESTION: 3

Find the incorrect statement-

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QUESTION: 4

Which of the following is not a terrestrial ecosystem

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QUESTION: 5

Which of the following constitute a food chain ?

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QUESTION: 6

Which of the following constitutes the forth trophic level ?

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QUESTION: 7

“Flow of energy is unidirectional”. It means that-

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QUESTION: 8

The maximum concentration of chemicals get accumulated in

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QUESTION: 9

DDT, a pesticide is-

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QUESTION: 10

Green house gases are-

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QUESTION: 11

Which of the following is biodegradable-

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QUESTION: 12

Montreal protocol became effective in-

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QUESTION: 13

Ozone depletion has resulted in-

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QUESTION: 14

Micro-organisms belongs to the group of-

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QUESTION: 15

Function of an ecosystem involves-

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QUESTION: 16

The driving force of an ecosystem is-

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QUESTION: 17

A food chain always starts with-

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QUESTION: 18

According to 10%10% law, the energy available to each successive level is _________ of previous level

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QUESTION: 19

The formula of Ozone is _______

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QUESTION: 20

The decomposers in an ecosystem-

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QUESTION: 21

In due given food chain, suppose the amount of energy available at third trophic level is 50 KJ, what will be the energy available at due producer level ?

Solution:

Only 10% of the energy present is given to the consumer at the next level, of the total energy the level/animal has.
Therefore, if 4th Level = 5kJ
3rd Level = 50kJ
2nd Level = 500kJ
Producer = 5,000kJ

QUESTION: 22

In the following groups of materials, which group contains only non biodegradable items.

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QUESTION: 23

An example of man-made ecosystem is -

Solution:

Examples of man-made ecosystems are orchards, home aquarium, zoo, botanical gardens and park. These ecosystems are sustained by human interventions. Aquarium and zoo ecosystem, for example, cannot survive without the care of humans. Man-made ecosystems are created for specific purposes.

QUESTION: 24

A food chain consist of

Solution:

A food chain is a series of plants/animals which are interrelated in the form of an organism being eaten as food by the other. A food chain consists of producers and consumers. In the given food chain, plants are producers. The animals eating plants are called primary consumers and animals eating primary consumers are called secondary consumers. 

Thus, the correct answer is 'Producers and consumers.'

QUESTION: 25

The process of eating and being eaten is called-

Solution:

A food web is similar to a food chain but larger.Food webs show how plants and animals are connected in many ways.

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