IAS (Admin.) Prelims GS Paper-I (Past Paper Ans/Explanations): Questions 208 - 210 of 210

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Question number: 208

» Environment and Ecology

MCQ▾

Question

With reference to Selective Catalytic Reduction technology, an emission control technology required for adopting Bharat Stage VI emission standards, consider the following statements:

1. It reduces the levels of SO2 in vehicular emissions.

2. It uses aqueous ammonia as a reducing agent within a catalyst system.

Which of the statements given above is/are correct?

Choices

Choice (4) Response

a.

2 only

b.

1 and 2

c.

1 only

d.

Neither 1 nor 2

Question number: 209

» Environment and Ecology

MCQ▾

Question

Which of the following steps can-be taken to reduce the problem of eutrophication?

1. Creating wetlands around a water body.

2. Reducing air pollution.

3. Using lakes for aquaculture.

Select the correct answer using the code given below.

Choices

Choice (4) Response

a.

2 only

b.

1, 2 and 3

c.

1 and 3 only

d.

1 and 2 only

Question number: 210

» Environment and Ecology

MCQ▾

Question

Which of the following ecological pyramids is/ars upright in case of a pond Ecosystem?

1. Pyramid of Number

2. Pyramid of Biomass

3. Pyramid of Energy

Select the correct answer using the code given below.

Choices

Choice (4) Response

a.

3 only

b.

1 and 2 only

c.

1 and 3 only

d.

1, 2 and 3

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