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Molecular seives are regenerated by heating to __________ °C.
The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be
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Which of the following factors control the deactivation of a porous catalyst pellet?
B.E.T. method can be used to determine the __________ of a porous catalyst.
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Highly porous refractory bricks are