Chemical Engineering MCQs

Page No. 160

Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas)__________________?


aT


b√T


c T2


d 1/√T


View Answer T

In the reaction, H2 +I2 ⇌ 2HI, addition of an inert gas will___________________?


aIncrease the partial pressure of H2


b Increase the partial pressure of I2


cIncrease the total pressure and hence shift the equilibrium towards the right


dNot affect the equilibrium conditions



A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1 is_________________?


a-1.87


b0


c1.26


d3.91


View Answer 0

One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one ________________?


aHour


b Day


cMinute


dSecond


View Answer Day

4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is_________________?


a4 J


b


c0


d8 J


View Answer 0

Specific/molar Gibbs free energy for a pure substance does not change during________________?


aSublimation


bVaporisation


cMelting


dEither A, B. or C.


View Answer Either A, B. or C.

The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is_________________?


a R loge 4


bR log10 4


cCv log10 4


dCv loge 4


View Answer R loge 4

The unit of equilibrium constant of a chemical reaction is the same as that of__________________?


aMolar concentration


bTemperature


cInternal energy


dNone of these


View Answer None of these

A liquid under pressure greater than its vapour pressure for the temperature involved is called a _____________ liquid?


aSub-cooled


b Saturated


cNon-solidifiable


dNone of these


View Answer Sub-cooled

The first law of thermodynamics is a restatement of the law of conservation of_________________?


aMass


bEnergy


cMomentum


dNone of these


View Answer Energy

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