Chemical Engineering MCQs

Page No. 128

In which of the following reaction equilibrium, the value of equilibrium constant Kp will be more than is Kc ?


a2HI ⇌ H2 + I2


bN2O4 ⇌ 2NO2


c2SO2 + O2 ⇌ 2SO3


dNone of these


View Answer N2O4 ⇌ 2NO2

The partial pressure of each constituent present in an alloy is _____________ the total vapor pressure exerted by the alloy?


aLess than


b Equal to


cMore than


d Either B. or C; depends on the type of alloy


View Answer Less than

In any spontaneous process, ?


aOnly F decreases


bOnly A decreases


cBoth F and A decreases


dBoth F and A increase



The change in Gibbs free energy for vaporisation of a pure substance is___________________?


aPositive


bNegative


cZero


d May be positive or negative


View Answer Zero

Corrosion resisting properties of cast iron are significantly improved by the addition of 12 – 15% of___________________?


aTungsten


bVanadium


cSilicon


dAll A., B. & C.


View Answer Silicon

The hardest material just prior to diamond in Mhos scale is_________________?


aTopaz


bCarborundum


cCorundum


dCalcite


View Answer Corundum

Answer: Option B 392. Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to _____________ °C?


a 270


b 327


c300


d540


View Answer 327

Carbon is present in the combined form (carbide) in case of______________________?


aPig iron


bSteel


cFerroalloys


dAll A., B. & C.


View Answer All A., B. & C.

Polymorphism is not exhibited by______________________?


aCarbon


bIron


cPhosphorous


dNone of these


View Answer None of these

Free energy___________________?


a Decreases in all spontaneous (or irreversible) processes


bChange during a spontaneous process has a negative value


cRemains unchanged in reversible processes carried at constant temperature and pressure


dAll A, B. and C


View Answer All A, B. and C

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