CBSE-NET (Based on NTA-UGC) Environmental Science (Paper-II): Questions 355 - 360 of 385

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Question number: 355

» Water Chemistry » Concept of DO, BOD, COD

Appeared in Year: 2009

MCQ▾

Question

A measure of the amount of oxygen consumed in the biological process that breaks down organic matter is known as: (June)

Choices

Choice (4) Response

a.

Bio concentration

b.

Bioaccumulation

c.

Biomagnification

d.

Biochemical oxygen demand

Question number: 356

» Energy Resources » Radioactive Waste and Radioactivity From Nuclear Reactors

Appeared in Year: 2009

MCQ▾

Question

After 560 days, 1 gm of a radioactive element is reduced to The half-life of the radioactive element is:

Choices

Choice (4) Response

a.

280 days

b.

140 days

c.

70 days

d.

210 days

Question number: 357

» Ecology and Evolution » Origin of Life and Speciation

Appeared in Year: 2009

MCQ▾

Question

Which of the following was formed first? (June)

Choices

Choice (4) Response

a.

DNA

b.

RNA

c.

DNA & RNA

d.

Eukaryotic cell

Question number: 358

» Energy Resources » Anaerobic Digestion

Appeared in Year: 2009

MCQ▾

Question

Which of the following bacterium is used in the recovery of otherwise unprofitable grades of Uranium and Copper ores? (June)

Choices

Choice (4) Response

a.

Azotobactor

b.

Thiobacillus ferrooxidans

c.

Escherichia coli

d.

Clostridium

Question number: 359

» Common Flora and Fauna in India » Terrestrial

Appeared in Year: 2009

MCQ▾

Question

Which of the following cell is present in bone cortex? (June)

Choices

Choice (4) Response

a.

Stem cells

b.

Astrocytes

c.

Osteocalcin

d.

Osteoblast

Question number: 360

» Air » Gas Laws

Appeared in Year: 2009

MCQ▾

Question

The equation of state of gas, incorporating the ‘Van der Waals’ correction is given as: (June)

Choices

Choice (4) Response

a.

b.

c.

d.

f Page
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