Stoichiometry
If 1.5 moles of oxygen combines with aluminium to form Al2O₃, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.

27
54
2.7
5.4

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Stoichiometry
A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container

Will be greater than 298 K
Can not be determined
Will be 298 K
Will be less than 298 K

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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

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

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