Environmental Awareness (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 32 - 33 of 33

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Question number: 32

» Environmental Awareness » Waste Disposal, Recycling and Power Generation

Appeared in Year: 2011

MCQ▾

Question

Fuel cells are devices that generate electricity by converting the energy released by – (December)

Choices

Choice (4) Response

a.

Biochemical reactions involving combustion process

b.

Electrochemical reactions without going through combustion process.

c.

Biochemical reactions without going through combustion process.

d.

Electrochemical reactions involving combustion process

Question number: 33

» Environmental Awareness » Desertification and Control

Appeared in Year: 2011

MCQ▾

Question

About what percentage of earth’s dry lands are deserts? (December)

Choices

Choice (4) Response

a.

23 – 26%

b.

43 – 53%

c.

10 – 20%

d.

33 – 36%

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