Chemical Engineering MCQs

Page No. 181

1 torr is equivalent to_________________?


a1 mm Hg


b1 Pascal


c1 atm


d1 mm wc


View Answer 1 mm Hg

An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is______________?


a0.2500


b0.2528


c0.5000


d0.5055


View Answer 0.5055

The density of a gas at N.T.P.is ‘ρ’. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75 ρ at a temperature of ____________ °K?


a273°


b300°


c 400°


d373°


View Answer 400°

A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct ?


aXc > Xs


bXc = Xs


cXc < Xs


dXc greater/less than Xs depending on the length of the cylinder


View Answer Xc < Xs

The temperature at which a real gas obeys Boyle’s law is termed as the__________________?


a Triple point


b Boyle’s temperature


c Eutectic point


d Inversion temperature



In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the________________?


aTotal pressure


bAbsolute humidity at a given temperature


cBoth A. and B.


d Neither A. nor B.


View Answer Both A. and B.

1 gm mole of methane (CH4) contains_________________?


a6.02 × 1023 atoms of hydrogen


b4 gm atoms of hydrogen


c3.01 × 1023 molecules of methane


d3 gms of carbon



If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?


a10


b100


c1000


d 10000


View Answer 1000

The equilibria relations in a multi-component and multiphase system cannot be calculated with the help of the_______________?


aPhase rule


b Experimental data


cEmpirical equations


d Theoretical equations


View Answer Phase rule

Solutions which distil without change in composition are called________________?


aIdeal


b Saturated


cSupersaturated


dAzeotropic


View Answer Azeotropic

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