Analysis of Coal

Which is the biggest pollution contributor from coal burning?

• Carbon Dioxide

• Carbon Monoxide

• Nitrous oxide

• Sludge

Which BEST describes how coal forms?

• dead plant material completely decomposes in a desert environment
• tiny sea animals and plants die and are buried by sediment 
• dead plant material temporarily decays in a swamp environment
• dead animals partially decay in a desert environment

______ coal has the highest carbon content and a metallic luster in appearance.

• anthracite
• lignite
• sub-bituminous
• bituminous

In analysis of coal, determination of _______ is done by Kjeldahl’s method.

• Volatile matter

• Nitrogen

• Ash

• Oxygen

In determination of carbon and hydrogen by ultimate analysis, increase in weight of calcium chloride bulb represents ______

• weight of water formed

• weight of carbon dioxide formed

• carbon

• hydrogen

Good quality of coal should have _____ % of oxygen.

• low

• high

• 100

• 0

Percentage of ash by analysis of coal is given by _____

• (weight of sample – weight of residue) × 100

• (weight of sample – weight of residue)/weight of sample × 100

• (weight of residue/weight of sample) × 100

• (weight of residue – weight of sample) × 100

In ultimate analysis, %hydrogen is given by __________

• (Increase in weight of CaCl2 tube×2×100 / weight of coal sample taken×18)

• (Increase in weight of KOH tube×2×100 / weight of coal sample taken×18)

• (Increase in weight of CaCl2 tube×4×100 / weight of coal sample taken×18)

• (Increase in weight of KOH tube×4×100 / weight of coal sample taken×18)

__________ is the weight of residue obtained after burning a weighed amount of dry coal.

• Ash

• Volatile matter

• Moisture

• Carbon

In proximate analysis of coal, %fixed carbon = __________

a)

b)

c)

d)

• 100 – % (ash + volatile matter + moisture)

• 100 – % (ash + moisture)

• 100 – % (ash-moisture) + %volatile matter

• 100 – % (moisture + volatile matter)