Which of the following component is not a constituent of coal *?

Which of the following is not a characteristic of coal?

Explanation: Moisture content represents the total vapours present inside the coal. Moisture develops from the outside atmospheric conditions due to which it is not a characteristic of coal.

Which of these components are undesirable in coal?

Unlike carbon, sulfur is actually an undesired contaminant in fuels. This means that if all of the sulfur could be removed from fossil fuels before they are burned, sulfur emissions would be slashed and pollution curbed.

Which of these is not a component of coal in ultimate analysis?

Explanation: Fixed carbon is the difference between 100% and sum of the percentages of volatile matter, moisture and ash. 3. Which of these is not a component of coal in Ultimate Analysis? Explanation: This component is not determined in Ultimate Analysis.

At what temperature should the coal be heated so as to determine the moisture content of coal?

Inherent moisture content is determined by heating an air-dried coal sample at 105°–110°C (221–230°F) under specified conditions until a constant weight is obtained.

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What is the formula of coal?

The chemical formula of coal is reported as: C135H96O9NS. Coal is usually taken as 85% carbon based on dry mass.

What are the 5 main types of coal?

Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.

Why presence of Sulphur in coal is harmful?

When coals are burned, leached and washed, sulfur will be released in the form of sulfide and H2S, which then react with O2, water and other substances to change into vitriol, and in some places it may form acid rain. And they will impact water environment, acidify the soil and do great harm to plants and human health.

What is the physical properties of coal?

Coal is slightly denser than water (1.0 megagram per cubic metre) and significantly less dense than most rock and mineral matter (e.g., shale has a density of about 2.7 megagrams per cubic metre and pyrite of 5.0 megagrams per cubic metre).

What is the ash content of coal?

Ash content of coal produced in the country is generally 25 to 45 % whereas average ash content of imported coal varies from 10 to 20 %. Indian Coal has comparatively higher ash content than imported coal due to drift theory of formation of coal deposits in India.

Which of these is not found in coal?

Coal is the substance composed of mainly carbon. Hydrogen, nitrogen, sulfur, and oxygen also present as impurities. Anthracite has the most carbon, while lignite is the lowest in carbon, but highest in hydrogen and oxygen.

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