Q.1
With increase in the temperature of pure (distilled) water, its
Q.2
1 gm mole of methane (CH₄) contains
Q.3
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are PvB and Pvw respectively. The partial pressure of benzene in air-vapour mixture is
Q.4
Pick out the wrong unit conversion of temperature.
Q.5
On mixing 56 gm of CaO with 63 gm of HNO₃, the amount of Ca(NO₃)₂ formed is __________ gm.
Q.6
For an ideal solution, the total vapor pressure varies __________ with the composition(expressed as mole fraction).
Q.7
N.T.P. corresponds to
Q.8
Heat of solution in a system in which both solute and solvent are liquids is termed as
Q.9
Mass number of an atom is the sum of the numbers of
Q.10
According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.
Q.11
Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).
Q.12
As per Kirchoff s equation, the heat of reaction is affected by the
Q.13
N₂ content in a urea sample was found to be only 42%. What is the actual urea content of the sample ? (molecular weight of urea = 60)
Q.14
Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is
Q.15
__________ equation gives the effect of temperature on heat of reaction.
Q.16
According to the kinetic theory, the thermal conductivity of a monoatomic gas is proportional to
Q.17
How much O₂ can be obtained from 90 kg of water?
Q.18
1 BTU/lb.←°F is equivalent to __________ kcal/kg.°C.
Q.19
A solution with reasonably permanent pH is called a/an __________ solution.
Q.20
The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of
Q.21
__________ equation relates latent heat and boiling point.
Q.22
Degrees of freedom will be equal to the number of components for a system comprising of
Q.23
Boiling point of a non-homogeneous mixture of immiscible liquids is __________ that of any one of its separate components.
Q.24
At standard conditions,
N₂ + 2O₂ ⇋ 2NO₂; ΔG° = 100 kJ/mole
NO + ½O₂ ⇋ 2NO₂; ΔG° = -35 kJ/mole
The standard free energy of formation of NO in kJ/mole is
Q.25
Pick out the wrong statement:
Q.26
Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?
Q.27
For the gaseous phase reaction, N₂ + O₂ ⇋ 2NO, ΔH = + 80 kJ/kg. mole; the decomposition of NO is favoured by
Q.28
Internal energy of a substance comprises of the __________ energy.
Q.29
At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to
Q.30
The average translational kinetic energy with which a gas molecule is endowed is dependent on its
Q.31
Which of the following has the smallest least effect on the solubility of a solute into the solvent?
Q.32
Atoms of the same element, but of different masses are called
Q.33
A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct?
Q.34
pH value of an alkaline solution is
Q.35
Average molecular weight of air is about
Q.36
If 1 Nm³ of O₂ contains 'N' number of molecules, then number of molecules in 2Nm³ of SO₂ will be
Q.37
The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.
Q.38
Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is
Q.39
Applicability of Claussius-Clapeyron equation is subject to the condition that the
Q.40
A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the
Q.41
Which of the following is insensitive to changes in pressure?
Q.42
Number of gram equivalent of solute dissolved in one litre of solution is called its
Q.43
Concentration of a solution expressed in terms of __________ is independent of temperature.
Q.44
Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the
Q.45
Which of the following gases is the most soluble in water?
Q.46
NaOH contains __________ percent oxygen.
Q.47
Increasing the temperature of an aqueous solution will cause decrease in its
Q.48
In a neutral solution
Q.49
A vessel of volume 1000 m³ contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately
Q.50
Pick out the correct statement.
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