Tag: carbon cycle

Questions Related to carbon cycle

What does 'Aluminum' irritate?

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Brook trout's gills

  2. Shark's gills

  3. Zooplankton's gills

  4. Phytoplankton's gills

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Correct Option: A

In ocean, carbon is usually in form of:

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Bicarbonates ions

  2. Carbon dioxide

  3. Calcium

  4. Phosphorous

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Correct Option: A

Emission of $CO$ and $NO _{2}$ are responsible for higher concentration of $O _{3}$ in

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Stratosphere

  2. Troposphere

  3. Thermosphere

  4. Biosphere

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Correct Option: B

What is natural sources of CO?

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. solid waste disposal

  2. Volcanic eruption and forest fire

  3. Motor vehicles

  4. Fuel combustion

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Correct Option: B

One molecule of CFCs contain 15000 molecules of

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. $CO _{2}$

  2. $CO$

  3. HCFCs

  4. CH4

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Correct Option: A

Proportion of CO consumption consists of basic components:

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. The leaf boundary layer

  2. The stomata

  3. Radiation exchange

  4. All of Above

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Correct Option: D

Carbon dioxide constitutes about 0.03% of the atmosphere

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. By volume

  2. By weight

  3. By mass

  4. None of these

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Correct Option: A
Explanation:

The air in our atmosphere is composed of molecules of different gases. The most common gases nitrogen  (78%), oxygen (about 21%), argon (almost 1%) and carbon dioxide (0.03%). Other molecules are present in  the atmosphere as well, but in very small quantities. Composition of air is measured in percent by volume,  at sea level at 15C and 101325 Pa.

Phtotochemical phase does not includes ________________.

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Fixation of ${CO} _{2}$

  2. Release of ${O} _{2}$

  3. Photolysis of water

  4. Formation of ATP and NADPH

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Correct Option: A
Explanation:

Photochemical phase includes photolysis of water and production of assimilatory power (ATP and NADPH). It liberates O2  during photolysis of water. 

The photochemical phase do not include fixation of CO2.

Chemical reactions triggered by ___________ transforms the organic material into hydrocarbons.

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. solar energy

  2. hydroelectric

  3. elevated temperatures

  4. decomposition

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Correct Option: C

Which one of the following statements regarding CO gas is correct ?

biology biogeochemical cycles carbon cycling mineral coal carbon cycle

  1. It is produced by the complete combustion of fossil fuels.

  2. It combines with haemoglobin to form carbamino-haemoglobin.

  3. It impairs oxygen transport resulting in giddiness, headache, asphyxia and even death.

  4. All of these

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Correct Option: C
Explanation:

Carbon monoxide ( CO ) is produced due to incomplete combustion of fossil fuels, metallurgical operations, automobile emission, cigarette smoking. CO combines with haemoglobin, produces carboxyhaemoglobin which impairs oxygen transport resulting in headache, decreased vision, cardiovascular disease, asphyxia.