Tag: mineral coal

Questions Related to mineral coal

In the earths crust carbon is found in the form of

biology biogeochemical cycles carbon cycling mineral coal carbon cycle

  1. Carbonates

  2. Hydrogen carbonates

  3. Petroleum

  4. All of the above

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Correct Option: D
Explanation:

In the Earths crust only 0.02% Carbon is found in the form of minerals like carbonates, hydrogen carbonates, coal and petroleum.

Burning of fossil fuels affects

biology biogeochemical cycles carbon cycling mineral coal carbon cycle

  1. Nitrogen cycle

  2. Carbon cycle

  3. Phosphorus cycle

  4. Water cycle

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Correct Option: B
Explanation:
Carbon dioxide is being added to the atmosphere through two types of processes,
(A) Biological i.e respiration and decomposition release carbon dioxide.
(B) Non biological i.e burning of biomass and fossil fuel release a lot of carbon dioxide. Thus burning of fossil fuels affect carbon cycle of nature
So, the correct answer is 'Carbon cycle'

Which of the owing statements regarding the maintenance of carbon cycle in the biosphere are correct?
a. Plant utilize solar energy to convert $CO _2$ and water into cellular materials and produce oxygen that animals consume.
b. Oxygen produced by the plants during carbon assimilation is not a byproduct.
c. Energy used by an animal comes from the oxidation of plant material releasing $CO _2$ that escapes into the atmosphere.
d. All decaying organic matter on the earth is ultimately degraded by molds and bacteria to yield $CO _2$ that escapes into the atmosphere.
Select the correct answer.

biology biogeochemical cycles carbon cycling mineral coal carbon cycle

  1. $2, 3$ and $4$

  2. $1, 3$ and $4$

  3. $1$ and $2$

  4. $1, 2, 3$ and $4$

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Correct Option: A

Carbon dioxide is a naturally-occurring component of the atmosphere.

biology biogeochemical cycles carbon cycling mineral coal carbon cycle

  1. True

  2. False

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Correct Option: A

The percentage of carbon in lignite is ______%.

biology ecology carbon cycling mineral coal carbon cycle

  1. $70\, to \,90$

  2. $60\, to\, 80$

  3. $60\, to\, 90$

  4. $60\, to \,70$

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Correct Option: D
Explanation:

Lignite is brownish-black in color and has a carbon content around   60–70  percent, a high inherent moisture content sometimes as high as $75$ percent, and an ash content ranging from $6–19$ percent.

The variety of coal having highest carbon content is:

biology coal, petroleum and petrochemicals carbon cycling mineral coal carbon cycle

  1. peat

  2. anthracite

  3. bituminous

  4. lignite

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Correct Option: B
Explanation:

Anthracite is a hard compact variety of coal that has a high lustre. it has the highest carbon content, fewest impurities and the highest calorific content of all types of coal which also include bituminous coal and lignite.

Peat coal contains about _____ % carbon.

biology coal, petroleum and petrochemicals carbon cycling mineral coal carbon cycle coal and its products

  1. 28

  2. 78

  3. 68

  4. 88

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Correct Option: A
Explanation:

There are four different types of coal

(i) Anthracite $\Rightarrow 90$% carbon
(ii) Bituminous $\Rightarrow 70$% carbon
(iii) Lignite $\Rightarrow 40$% carbon
(iv) Peat coal $\Rightarrow 28$% carbon
Peat coal has $28$% carbon.

Which of the primary state in transformation of coal?

biology coal, petroleum and petrochemicals carbon cycling mineral coal carbon cycle

  1. Peat

  2. Lignite

  3. Bitumen

  4. Anthracite

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Correct Option: A
Explanation:

Peat is the first stage in the formation of coal. The heat and pressure from the top layers convert dead plants into a spongy brown material called peat.

What percentage of carbon in Bituminous coal?

biology coal, petroleum and petrochemicals carbon cycling mineral coal carbon cycle coal and its products

  1. $28-30\%$

  2. $28\%$

  3. $78-86\%$

  4. $94-98\%$

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Correct Option: C
Explanation:
Type of coal Percentage of carbon
Peat $28\%$
Lignite $28-30\%$
Bituminous $78-86\%$
Anthracite $94-98\%$

The purest form of coal is:

biology coal, petroleum and petrochemicals carbon cycling mineral coal carbon cycle coal and its products

  1. peat

  2. anthracite

  3. lignite

  4. bituminous coal

Show answer
Correct Option: B
Explanation:

High grade (HG) and ultra high grade (UHG) anthracite are the highest grades of anthracite coal. 

They are the purest forms of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities (moisture, ash and volatiles).

Anthracite contains nearly 95% of carbon and is the purest form of coal so anthracite is the purest form of coal than any other forms.

Therefore, option B is correct.