Tag: study of coal

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Multiple choice chemistry rocks and minerals coal and its products study of coal coal

The petroleum product that has replaced coal-tar for metalling the road is __________.

  1. peat

  2. bitumen

  3. lignite

  4. anthracite
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Bitumen is an oil-based substance. It is a semi-solid hydrocarbon product produced by removing the lighter fractions (such as liquid petroleum gas, petrol, and diesel) from heavy crude oil during the refining process. 

As such, it is correctly known as refined bitumen. It is used as a road paving material. The vast majority of refined bitumen is used in construction: primarily as a constituent of products used in paving and roofing applications. According to the requirements of the end-use bitumen is produced to specification.

So, the correct option is $B$
Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Coal can be formed from ____________.

  1. sunlight

  2. steam

  3. fossils

  4. plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When dead plants get buried into the bottom of the soil they are slowly converted into coal due to high pressure and high temperature. Heat and pressure produced chemical and physical changes in the plant layers which forced out oxygen and left rich carbon deposits. In time, material that had been plants became coal.

Coal is formed from plants and animals that died millions of years ago.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

The characteristic of coal is ___________.

  1. toughness

  2. black in colour

  3. porous nature

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Since coal is a form of sedimentary rock, it's is hard and porous. It is black due to its prime composition of carbon, compressed at high temperature and pressure.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Which of the following is not characteristic of coke?

  1. Hard

  2. Porous

  3. High carbon content

  4. Soft
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Coke is a tough, porous and black substance. It is the purest form of carbon. Coke is used in the homes for cooking, heating and in industries, for manufacturing of steel and extraction of many metals. It is also used in thermal power plants to produce electricity.
Hence, option D is the correct option