Engineering Thermodynamics
According to Avogadro's Hypothesis

The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
Product of the gas constant and the molecular weight of an ideal gas is constant
Gases have two values of specific heat
The sum of partial pressure of mixture of two gases is sum of the two

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Engineering Thermodynamics
Carbonization of coal consists of

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

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