Mass Transfer Gaseous diffusivity at atmospheric pressure is of the order of __________ cm²/second. > 10 5 to 10 1 to 5 1 > 10 5 to 10 1 to 5 1 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm. 2.5 to 3 1.2 to 1.5 5 3 to 4 2.5 to 3 1.2 to 1.5 5 3 to 4 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The main reason for dividing a tall packed tower into series of small towers is to Avoid flooding Avoid channeling Reduce liquid hold up Minimise the overall pressure drop Avoid flooding Avoid channeling Reduce liquid hold up Minimise the overall pressure drop ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is > 1 < 1 1 > 1 < 1 1 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in Degree of ideality of the solution Both A & B Viscosity with concentration Neither A nor B Degree of ideality of the solution Both A & B Viscosity with concentration Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Fractional solvent extraction Employs only one solvent Employs two solvents None of the listed here Results in low interfacial tension Employs only one solvent Employs two solvents None of the listed here Results in low interfacial tension ANSWER DOWNLOAD EXAMIANS APP
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