Chemical Composition of Air (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 6 - 10 of 17

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Question number: 6

» Chemical Composition of Air » Chemical Process to Form Inorganic and Organic Particulate Matter

Appeared in Year: 2015

MCQ▾

Question

A non-metal ‘X’ occurs in nature in free state. It combines with hydrogen to form a gas, which is colorless and highly toxic. Apart from this, ‘X’ is oxidized to XO2 which is a colourless, pungent and irritating gas. ‘X’ represents: (June)

Choices

Choice (4) Response

a.

Nitrogen

b.

Sulphur

c.

Carbon

d.

Phosphorus

Question number: 7

» Chemical Composition of Air » Particles, Ions and Radicals in the Atmosphere

Appeared in Year: 2015

MCQ▾

Question

Which of the following does not add the carbon dioxide concentration in atmosphere? - (June)

Choices

Choice (4) Response

a.

Photosynthesis

b.

Decay of organic matter

c.

Respiration

d.

Volcanic action

Question number: 8

» Chemical Composition of Air » Oxygen and Ozone Chemistry

Appeared in Year: 2015

MCQ▾

Question

Corrosion normally occurs when an electrochemical cell is set up on a metal surface. The corroded area is (June)

Choices

Choice (4) Response

a.

Entire metal surface

b.

Electrolyte

c.

Cathode

d.

Anode

Question number: 9

» Chemical Composition of Air » Chemical Process to Form Inorganic and Organic Particulate Matter

Appeared in Year: 2015

MCQ▾

Question

Burning of 1 mol of CH4 liberates 890 kJ of energy and 1 mol of CO2 . Since 1 mol of CO2 has 12 g of carbon, the higher heating value (HHV) of methane is: (June)

Choices

Choice (4) Response

a.

13.5gCMJ

b.

18.5gCMJ

c.

12.0gCMJ

d.

10.0gCMJ

Question number: 10

» Chemical Composition of Air » Classification of Elements

Appeared in Year: 2009

MCQ▾

Question

Which one of the following is not a permitting cryoprotectant? – (December)

Choices

Choice (4) Response

a.

Glycerol

b.

Sucrose

c.

DMSO

d.

1, 2 – propanediol

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