Q.1
Pick out the wrong unit conversion.
Q.2
Pick out the wrong unit conversion.
Q.3
One 'Therm' is equivalent to
Q.4
Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at
Q.5
A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
Q.6
Kopp's rule is helpful in finding the
Q.7
In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is
Q.8
Number of gm moles of solute dissolved in one litre of a solution is called its
Q.9
A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container
Q.10
Which of the following gravity scales is used exclusively for liquids heavier than water?
Q.11
Which of the following expressions defines the Baume gravity scale for liquids lighter than water?
Q.12
Atmospheric pressure corresponds to a hydrostatic head of
Q.13
Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches
Q.14
In __________ process, ions of salts react with water to produce acidity or alkalinity.
Q.15
pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be
Q.16
No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules
Q.17
In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?
Q.18
Isotopes are atoms having the same
Q.19
One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to
Q.20
How many phases are present at eutectic point?
Q.21
An azeotropic solution of two liquids has boiling point lower than either of them, when it
Q.22
The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).
Q.23
With rise in pressure, the solubility of gases in solvent, at a fixed temperature
Q.24
Pick out the wrong unit conversion.
Q.25
Total energy at a point comprises of __________ energy.
Q.26
The reverse process of fractional crystallisation is called
Q.27
One micron is equal to
Q.28

CaCO3 contains __________ percent of Ca by weight.

  • 40
  • 48
  • 96
  • 12
Q.29

One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = -kJ/mole of methane. Mole fraction of water vapour in the product gases is about

  • 0.19
  • 0.33
  • 0.40
  • 0.67
Q.30

In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.

  • kg of solute/kg of solvent
  • kg-mole of solute/kg-mole of solvent
  • kg-mole of solute/1000 kg of solvent
  • all (a), (b) & (c)
Q.31

Solutions which distil without change in composition are called

  • ideal
  • saturated
  • supersaturated
  • azeotropic
Q.32

Gases having same reduced temperatures and reduced pressures

  • deviate from ideal gas behaviour to the same degree.
  • have nearly the same compressibility factor.
  • both (a) and (b).
  • neither (a) nor (b).
Q.33

Volume percent for gases is equal to the

  • weight percent.
  • mole percent.
  • weight percent only for ideal gases.
  • mole percent only for ideal gases.
Q.34

A sugar solution containing __________ percent sugar is equivalent to 1 Brix.

  • 0.01
  • 0.1
  • 1
  • 10
Q.35

Which of the following is not a unit of pressure ?

  • Torr
  • Newton/m2
  • Parsec
  • Ata, bar or pascal
Q.36

The evaporation of aqueous solution of sugar causes its molarity to

  • decrease. (b) increase.
  • remain unchanged.
  • either (a) or (b); depends on the concentration of the solution.
Q.37

Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches

  • ∞
  • 0
  • 1
  • 0.24
Q.38

__________ equation gives the effect of temperature on heat of reaction.

  • Kirchoffs
  • Maxwell's
  • Antonie
  • Kistyakowsky
Q.39

Which of the following has the smallest least effect on the solubility of a solute into the solvent ?

  • Nature of the solute
  • Nature of the solvent
  • Temperature
  • Pressure
Q.40

Cp equals Cv at

  • 0°C
  • 0°K
  • 0°F
  • 0°R
Q.41

1 Kcal/kg. °C is equivalent to __________ BTU/lb. °F.

  • 1
  • 2.42
  • 4.97
  • none of these
Q.42

Pick out the wrong statement.

  • The evaporation of aqueous solution of glucose causes its molarity to increase.
  • Both the freezing point as well as boiling point of sea water is more than that of distilled water.
  • The solution containing equal masses of two liquids 'X' and 'Y' has the same mole fraction of' 'X' and 'Y'.
  • both (b) and (c)
Q.43

Raoult's law is not applicable to the

  • solutes which dissociate or associate in the particular solution.
  • concentrated solutions.
  • both(b)&(c)
  • solutions containing non-volatile solute.
Q.44

In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?

  • Use of equation of state
  • Fugacity co-efficient
  • Activity co-efficient
  • None of these
Q.45

Boiling point of a non-homogeneous mixture of immiscible liquids is __________ that of any one of its separate components.

  • lower than
  • higher than
  • equal to
  • either (a) or (b); depends on the liquids
Q.46

"The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes". This is the __________ law.

  • Dalton's
  • Amgat's
  • GayLussac's
  • Avogadro's
Q.47

The osmotic pressure of a solution is directly proportional to the

  • lowering of vapor pressure.
  • molecular concentration of the solute.
  • absolute temperature of a given concentration.
  • all (a), (b) and (c).
Q.48

A compound was found having nitrogen and oxygen in the ratiogm andgm respectively. The formula of the compound is

  • N2O4
  • N2O5
  • N2O3
  • none of these
Q.49

If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will

  • be reduced to l/4th.
  • increase four times.
  • increase two times.
  • none of these.
Q.50

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

  • saturated
  • supersaturated
  • superheated
  • none of these
0 h : 0 m : 1 s