Chemical Engineering MCQs

Page No. 184

With increase in the temperature of pure (distilled) water, its____________________?


apOH decreases and pH increases


bpOH and pH both decreases


cpH and pOH both increases


dpH decreases and pOH increases



6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be ______________ gm?


a0.5


b 1


c3


d5


View Answer 0.5

Boiling point of a solution as compared to that of the corresponding solvent is _________________?


aless


bMore


cSame


dEither more or less; depends upon the solvent


View Answer More

Number of gm moles of solute dissolved in 1 kg of solvent is called its___________________?


aNormality


bMolarity


cMolality


dFormality


View Answer Molality

Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263°C and 2 atm ?


a 1


b2


c3


d4


View Answer 2

What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C ?


a2/3


b1/3


c1/2


d1/3 × (298/273)


View Answer 1/3

An ideal gas can be liquefied, because ___________________?


a Its molecular size is very small


bIts critical temperature is more than 0°C


cForces operative between its molecules are negligible


d It gets solidified directly without becoming liquid



Vapor pressure of water at 100°C is about _______________ bar?


a 0.1013


b1.013


c10.13


d101.3


View Answer 1.013

A very dilute solution is prepared by dissolving ‘x1’ mole of solute in ‘x2’ mole of a solvent. The mole fraction of solute is approximately equal to_________________?


a x1/x2


b x2/x1


c1 – (x1/x2)


d 1/x2


View Answer x1/x2

Atomic ______________ of an element is a whole number?


aWeight


bNumber


cVolume


dRadius


View Answer Number

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