Q.1

Pick out the wrong statement about the recycle stream in a process.

  • Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants.
  • The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio.
  • Recycling in a process does not help in getting higher extent of reaction.
  • Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column.
Q.2

Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is

  • 0
  • 1
  • 2
  • 3
Q.3

A vessel of volumem3 contains air which is saturated with water vapour. The total pressure and temperature arekPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.kPa, the amount of water vapour (in kg) in the vessel is approximately

  • 17
  • 20
  • 25
  • 34
Q.4

A gaseous mixture containskg of N2,kg of O2 andkg of NH3. The mole fraction of oxygen is

  • 0.16
  • 0.33
  • 0.66
  • 0.47
Q.5

Pure oxygen is mixed with air to produce an enriched air containingvolume % of oxygen. The ratio of moles of air to oxygen used is

  • 1.72
  • 0.58
  • 0.5
  • 0.2
Q.6

According to the kinetic theory, the thermal conductivity of a monoatomic gas is proportional to

  • T
  • T0.5
  • T1.5
  • T2
Q.7

The depression in freezing point of a solution is

  • inversely proportional to the mass of solvent.
  • directly proportional to the mole of solute.
  • both (a) and (b).
  • neither (a) nor (b).
Q.8

The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is

  • less than 100°C
  • 100°C
  • between 100 and 110°C
  • 110.6°C
Q.9

Cv for monoatomic gases is equal to(where, R = gas constant)

  • R
  • 1.5 R
  • 2R
  • 3R
Q.10

Internal energy is independent of the __________ for an ideal gas.

  • pressure
  • volume
  • both (a) & (b)
  • neither (a) nor (b)
Q.11

Except for monoatomic gases, the molal heat capacity at constant volume for all gases is __________ Kcal/Kg mole.° K.

  • 3
  • > 3
  • < 3
  • < 1
Q.12

In a neutral solution

  • H+ ions are absent.
  • OH- ions are absent.
  • both H+ and OH- ions are present in very small but equal concentration.
  • none of these.
Q.13

1 bar is almost equal to __________ atmosphere.

  • 1
  • 10
  • 100
  • 1000
Q.14

With rise in temperature, the solubility of ammonia in water at a fixed pressure

  • increases
  • decreases
  • remains unchanged
  • increases exponentially
Q.15

The number of H+ in 1 c.c solution of pHis

  • 6.023 xl013
  • 6.023 x 1010
  • 6.023xl07
  • 1013
Q.16

Pick out the correct statement.

  • A substance existing above its critical temperature is called a saturated vapor.
  • A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is more than the partial pressure of the vapor at the same temperature.
  • Heat added to or given up by a substance at constant temperature is called the sensible heat.
  • The end points of a vapor-pressure vs. temperature curve are critical and triple points.
Q.17

Normality of a solution does not change with the increase in the

  • pressure
  • temperature
  • solute concentration
  • dilution of the solution
Q.18

The quantity of heat required to evaporate 1 kg of a saturated liquid is called

  • specific heat
  • 1 Kcal
  • sensible heat
  • latent heat
Q.19

Pick out the wrong unit conversion of thermal conductivity.

  • 1 BTU/ft2.hr.°F/ft = 1.488 kcal/m2. hr.°C/m
  • 1 BTU/ft2.hr.°F/inch = 1.488 kcal/m2. hr.°C/m
  • 1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K
  • 1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F
Q.20

Cp - Cv, for an ideal gas is equal to

  • R
  • R/2
  • 2R
  • 3R
Q.21

An aqueous solution of 2.by weight H2SO4 has a specific gravity of 1.The composition expressed in normality is

  • 0.2500
  • 0.2528
  • 0.5000
  • 0.5055
Q.22

Which of the following ideal gas laws are not applicable to mixture of gases ?

  • Amgat's law
  • Dalton's law
  • Boyle's law & Charle's Law
  • none of these
Q.23

Othmer chart is useful in estimating the heat of

  • mixing
  • wetting
  • adsorption
  • none of these
Q.24

Volume occupied by one gm mole of a gas at S.T.P. is

  • 22.4 litres
  • 22400 litres
  • 22.4 c.c
  • 359 litres
Q.25

A solution of specific gravity 1 consists ofA by weight and the remaining B. If the specific gravity of A is 0.the specific gravity of Bis

  • 1.25
  • 1.3
  • 1.35
  • 1.2
Q.26

Unit of power is

  • joule
  • watt
  • joule/Second
  • both(b)&(c)
Q.27

__________ fuels require the maximum percentage of 'excess air' for complete combustion.

  • Solid
  • Liquid
  • Gaseous
  • Nuclear
Q.28

Heat of reaction is a function of the

  • pressure
  • temperature
  • both(a)&(b)
  • neither (a) nor (b)
Q.29

In __________ process, ions of salts react with water to produce acidity or alkalinity.

  • hydration
  • hydrolysis
  • electrolysis
  • dialysis
Q.30

Kopp's rule is useful for the determination of

  • molal heat capacities of gases.
  • heat capacities of solids.
  • activation energy.
  • heat capacities of gases.
Q.31

If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.

  • 10
  • 20
  • 70
  • 100
Q.32

The temperature at which a real gas obeys Boyle's law is termed as the

  • triple point
  • Boyle's temperature
  • eutectic point
  • inversion temperature
Q.33

Applicability of Claussius-Clapeyron equation is subject to the condition that the

  • vapor follows ideal gas law.
  • volume in the liquid state is negligible.
  • both (a) & (b)
  • neither (a) nor (b)
Q.34

The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately

  • 0.07
  • 0.09
  • 0.11
  • 0.13
Q.35

The vapor pressure of water at 100°C is

  • 100N/m2
  • 76 cms of Hg
  • 13.6 cms of Hg
  • 760 mm wc
Q.36

Which of the following is insensitive to changes in pressure ?

  • Heat of vaporisation
  • Melting point
  • Heat of fusion
  • Both (b) and (c)
Q.37

Avogadro's number is equal to

  • 6.023 x 1023 molecules/kg.mole.
  • 6.023 x 1023 molecules/gm.mole.
  • 6.023 x 1016 molecules/kg.mole.
  • 6.023 x 1026 molecules/gm.mole.
Q.38

__________ equation relates latent heat and boiling point.

  • Antonie
  • Kistyakowsky
  • Kopp's
  • Trouton's
Q.39

Enthalpy of a vapor gas mixture may be increased by increasing the

  • temperature at constant humidity.
  • humidity at constant temperature.
  • temperature and the humidity.
  • all (a), (b) & (c).
Q.40

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

  • nature of both the gas & the liquid.
  • temperature.
  • total pressure.
  • none of these.
Q.41

Pick out the wrong unit conversion.

  • 1 J = 1 W.Second = 107 ergs = 9.5 x 10-4 BTU = 0.2389 calorie
  • 1 Watt = 746 hp
  • -
  • -
Q.42

For the gaseous phase reaction, N2 + O22NO, ΔH = +kJ/kg. mole; the decomposition of NO is favoured by

  • increasing the concentration of N2.
  • decrease in temperature.
  • increase in pressure.
  • decrease in pressure.
Q.43

Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the

  • vapor follows the ideal gas law.
  • molal latent heat of vaporisation is constant within the limited temperature range.
  • volume in the liquid state is negligible compared with that in the vapor state.
  • all (a), (b) & (c).
Q.44

The unit of Cp in S.I. units is

  • W/m2.°K
  • J/kg.°K
  • W/m.°K
  • J/m3. °K
Q.45

Dry air is a mixture of

  • vapors
  • gases
  • both (a) & (b)
  • neither (a) nor (b)
Q.46

A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.

  • saturated
  • superheated
  • unsaturated
  • dry gaseous
Q.47

Pick out the wrong unit conversion.

  • 1 J = 1 W.Second = 107 ergs = 9.5 x 10-4 BTU = 0.2389 calorie
  • 1 Watt = 746 hp
  • -
  • -
Q.48

With rise in temperature, the heat capacity of a substance

  • increases
  • decreases
  • remains unchanged
  • either (a) or (b); depends on the substance
Q.49

1m3 is approximately equal to

  • 28 litres
  • 35 ft3
  • 4.5 litres
  • 4.5 ft3
Q.50

The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the

  • Trouton's rule
  • Kopp's rule
  • Antonie equation
  • Kistyakowsky equation
0 h : 0 m : 1 s