Stoichiometry
If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will

Decrease three fold
Increase nine fold
Remain unaltered
Increase three fold

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Stoichiometry
At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be

Indeterminate due to lack of data
Significantly more than 4.69 atm
Significantly less than 4.69 atm
Nearly equal to 4.69 atm

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Stoichiometry
Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

Component molecules are non-polar and no chemical combination or molecular association between unlike molecules takes place in the formation of the solution
All of these
Sizes of the component molecules are approximately equal
Attractive forces between like and unlike molecules are approximately equal

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Stoichiometry
Pick out the wrong unit conversion of heat transfer co-efficient.

1 BTU/ft².hr.°F = 4.88 kcal/m².hr.°C = 20.44 kJ/m².hr°C = 5.678 W/m².°C
1 kcal/m².hr.°C = 0.2048 BTU/ft².hr. °F. = 1.163 W/m².°K
1 W/m² . °C = 0.1761 BTU/ft².hr.°F
1 kcal/m².hr.°K = 1.163 W/m².°C

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