Engineering Thermodynamics
Carbonization of coal consists of

Drying and crushing the coal to a fine powder
Heating the wood with a limited supply of air to temperature not less than 280°C
None of these
Moulding the finely ground coal under pressure with or without a binding material

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Engineering Thermodynamics
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that

Heat is supplied to water at temperature below the maximum temperature of the cycle
Rankine cycle is hypothetical
Carnot cycle can't work with saturated steam
A Rankine cycle receives heat at two places

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Engineering Thermodynamics
Extensive property of a system is one whose value

Depends on the mass of the system like volume
Does not depend on the mass of the system, like temperature, pressure, etc.
Is dependent on the path followed and not on the state
Is not dependent on the path followed but on the state

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