Question

During the carbonisation of coal

a.

all tar is evolved at < 600°C.

b.

evolution of H₂ and formation of methane and aromatics occur at > 700°C.

c.

hard semi-coke starts shrinking at 600°C.

d.

all (a), (b) and (c).

Answer: (d).all (a), (b) and (c).

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. During the carbonisation of coal

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. Pulverised coal used in boiler firing need not have

Q. Lurgi coal gasifier is a pressurised __________ bed reactor.

Q. Which is the most matured coal ?

Q. The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be

Q. Caking index of coal blend used for blast furnace coke making is about

Q. Washing of coal

Q. Calorific value of of blast furnace gas is around __________ KCal/Nm³.

Q. In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.

Q. Coal tar (produced by high temperature carbonisation) is the main source of

Q. The calorific value is the highest out of the following for

Q. Coke compared to the coal from which it has been made, contains

Q. A gaseous fuel in order to develop luminousity on burning, must contain

Q. Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in

Q. The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called

Q. A coal having high volatile matter content will

Q. During coking of coal, the ash content (percentage)

Q. Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.

Q. The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

Q. The weathering index of a coal

Q. Bright coal

Recommended Subjects

Are you eager to expand your knowledge beyond Basic Chemical Engineering? We've handpicked a range of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!