NTA-NET (UGC-NET) Environmental Science (89): Questions 272 - 274 of 1711

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Question 272

Appeared in Year: 2019

Question MCQ▾

Which of the following is characteristics of direct band gap semi-conductor Ga-As? (December)

(i) Less sharp absorption band

(ii) Large values of extinction coefficient

Choose the correct answer from options given below:

Choices

Choice (4)Response

a.

(i) and (ii)

b.

(i) only

c.

(ii) only

d.

Neither (i) nor (ii)

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Question 273

Appeared in Year: 2017

Question MCQ▾

Which of the following are useful indicators of pollution potential of organic effluents? (January)

(a) Total Organic Carbon (TOC)

(b) Biological Oxygen Demand (BOD)

(c) Turbidity

(d) Conductivity

Choose the correct code:

Choices

Choice (4)Response

a.

(a) and (b) only

b.

(a) and (c) only

c.

(b) and (d) only

d.

None of the above

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Question 274

Appeared in Year: 2019

Question Assertion-Reason▾

Assertion(Ꭺ)

Strategic Environmental Assessment (SEA) is a more advanced tool in environmental management (July)

Reason(Ꭱ)

SEA is applicable at the level of policy, planning and programmes.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

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