Q.1
Pick out the correct statement.
Q.2
A very dilute solution is prepared by dissolving 'x1' mole of solute in 'x2' mole of a solvent. The mole fraction of solute is approximately equal to
Q.3
1 Kcal/kg. °C is equivalent to __________ BTU/lb. °F.
Q.4
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
Q.5
1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?
Q.6
Pick out the wrong statement:
Q.7
Pick out the wrong statement.
Q.8
'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the
Q.9
If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will
Q.10
The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is __________ kg mole.
Q.11
The value of gas constant 'R' is __________ kcal/kg.mole.°C.
Q.12
In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest?
Q.13
In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the
Q.14
Claussius Clapeyron equation applies to the __________ process.
Q.15
With increase in the solute concentration, the specific heat of aqueous solutions
Q.16
'Giga' stands for
Q.17
The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.
Q.18
pH value of a solution containing 1 gm of hydrogen ion per litre will be
Q.19
Weight of 56 litres of ammonia at N.T.P. is __________ gm.
Q.20
During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.
Q.21
Disappearance of snow in subzero weather exemplifies the process of
Q.22
At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be
Q.23
If a solution of eutectic composition is cooled, __________ reaching the eutectic temperature.
Q.24
Heat of __________ of a fuel is called its calorific value.
Q.25
Which of the following is not a unit of pressure?
Q.26
The quantity of heat required to evaporate 1 kg of a saturated liquid is called
Q.27
The elevation in boiling point of a solution is proportional to the __________ of the solution.
Q.28
For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is
Q.29
The evaporation of aqueous solution of sugar causes its molarity to
Q.30
__________ chart is a graph related to Antonie equation.
Q.31
Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.
Q.32
If 1.5 moles of oxygen combines with aluminium to form Al2O₃, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.
Q.33
Pick out the wrong statement.
Q.34
A car tyre of volume 0.057 m³ is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is
Q.35
A gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c.
Q.36
The latent heat of vaporisation
Q.37
Real gases approach ideal behaviour at
Q.38
Avogadro number is the number of molecules in one __________ of a gas.
Q.39
If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is __________ times.
Q.40
The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements. This is the statement of
Q.41
Boiling point of a solution as compared to that of the corresponding solvent is
Q.42
Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity?
Vapour pressure of water at 20°C is 17.5 mm Hg.
Q.43
Validity of the relationship, inputs = outputs, holds good for the system at steady state
Q.44
Normality of a solution does not change with the increase in the
Q.45
The chemical nature of an element is independent of
Q.46
The osmotic pressure of a solution increases, if its __________ is decreased.
Q.47
A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is
Q.48
If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its
Q.49
The number of atoms of oxygen present in 11.2 litres of ozone (O₃) at N.T.P. are
Q.50
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
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