Chemical Engineering MCQs

Page No. 417

One of the specific gravity scales is “Brix” (used specifically for sugar solution). It is defined as ______________?


aBrix = (400/G) – 400


bBrix = 200 (G-1)


cBrix = 145 – (145/G)


dNone of these



A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be_______________?


a-136.5°C


b– 136.5°K


c-273°C


d0°K


View Answer -136.5°C

The heat evolved in the combustion of benzene is represented by the equation: C6H6 + 7.5 O2 = 6CO2 + 3H2O, ΔH = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be _____________ kJ/kgmole?


a+816.15


b+1632.3


c-1632.3


d-2448.45


View Answer -1632.3

A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of ________________?


a3


b100


c1000


dNone of these


View Answer 1000

Heat of ____________ of a fuel is called its calorific value?


aFormation


bFormation


cReaction


dVaporisation


View Answer Formation

The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the_______________?


aNature of both the gas & the liquid


bTemperature


cTotal pressure


dNone of these


View Answer None of these

The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?


aH2O > C2H5OH > CS2


bCS2 > C2H5OH > H2O


cH2O > CS2 > C2H5OH


dCS2 > H2O > C2H5OH


View Answer H2O > C2H5OH > CS2

Viscosity of 1 centipoise is equal to 1 Centistoke in case of________________?


aWater


bMercury


cCarbon tetrachloride


dNone of these


View Answer Water

Pick out the wrong unit conversion of temperature?


a°R = 273 + °F


bTemperature difference of 1°K = 1°C = 9/5°F


c°C = (F- 32) × 0.555


d°F = (°C + 17.778) × 1.8


View Answer °R = 273 + °F

A vapor that exists above its critical temperature is termed as a _____________ vapor?


aSaturated


bUnsaturated


cGaseous


dSub-cooled


View Answer Gaseous

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