Engineering Thermodynamics
Coke is produced

From the finely ground coal by moulding under pressure with or without a binding material
By heating wood with a limited supply of air to a temperature not less than 280°C
When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
When coal is first dried and then crushed to a fine powder by pulverizing machine

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Engineering Thermodynamics
According to Avogadro’s law

All of these
The sum of partial pressure of the mixture of two gases is sum of the two
The product of the gas constant and the molecular mass of an ideal gas is constant
Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules

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