Explanation: The deposits of lignite in Neyveli are estimated to be about 200 million tonnes. The Neyveli project is under the Lignite Corporation of India which produces millions of tonnes of lignite in India.

Explanation: Schist is a type of laminated lignite coal which when extracted is of black colour rather than brown. The Australian morewell coal is brown in colour and is found in the hazelwood power station in Victoria, Australia.

Explanation: Bituminous coal burns with a smoky yellow flame which on distillation gives coal tar which is bituminous in nature. Charcoal is produced by the destructive distillation of wood and coke is formed by the carbonisation of peat under certain conditions of temperature and pressure.

Explanation: These coal are harder than lignite, they are black in colour and possess a dull waxy lustre. The bituminous coal contains 78-90% of carbon in them where as the semi-bituminous coal contains 90-93 % of carbon.

Explanation: The largest deposits are of bituminous coal in the earth, its extraction is easier than that of anthracite coal and it does have a moderate ignition temperature. Lignite deposits are also present in large quantities but its ignition temperature is low and that of peat in extremely low.

Explanation: Semi-bituminous have both the characteristics of bituminous coal and anthracite, their carbon content is around 90-93%. The sub-bituminous coal forms a group between lignite and bituminous coal and contains 75-83 % carbon in them.

Explanation: The Raniganj coal mines have a total coal reserve of 49.17 billion tonnes which are spread across West Bengal and Jharkhand. It was established in 1975. The Neyveli coal field contains lignite in high quantities and Gondwana coal fields also contain bituminous coal. The Nilgiri Hills have deposits of peat in them.

Explanation: Conchoidal fracture represents the way in which a brittle material break with making ripples. Anthracite coal forms a layer due to this fracture. This type of fractures are not formed in other types of coals which include peat, lignite and bituminous coal respectively.

Explanation: Due to the low percentage of volatile matter present in anthracite, it produces a very little flame which is blue in colour and is non-smoky. The bituminous coal produces a yellow smoky flame.

Explanation: Anthracite contains less than 1 % of arsenic due to which it does not affect on the properties of mal and hops during their drying. Due to this reason we do not use semi-bituminous coal for drying mal and hops.

Explanation: Due to the presence of high carbon content in high grade anthracite, it is used for making steel. Standard grade anthracite is used as domestic fuel in industrial power generation. Ultra high grade anthracite coal are also known as smokeless coal.

Explanation: The Dalingkot coal fields near the foothills of Darjeeling are rich in anthracite deposits. In Madhya Pradesh bituminous deposits are present, which are part of Singrauli coal fields.

Explanation: Calorific value is directly proportional to the percentile of hydrogen and it does not depend on the percentile of nitrogen. The volatile matter also does not affect the calorific value as they are not obtained after complete combustion.

Explanation: Anthracite are the highest grade of coal which consists of 93-98 % carbon is the hardest of all the coal. It has low volatile content. Semi-bituminous coal are softer than anthracite but harder than bituminous coal.