Q.1
The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.
Q.2
If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will
Q.3
For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.
Q.4
Dry air is a mixture of
Q.5
A reduction process is accompanied with increase in the
Q.6
In physical adsorption, as compared to chemisorption, the
Q.7
The rate of material __________ is zero in case of a steady state system.
Q.8
Volume percent for gases is equal to the
Q.9
The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the
Q.10
Pick out the wrong unit conversion of calorific value.
Q.11
What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C?
Q.12
Kopp's rule is concerned with the calculation of
Q.13
Pick out the wrong statement.
Q.14
For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.
Q.15
Pick out the correct conversion.
Q.16
1 Pascal (unit of pressure) is equal to __________ N/m².
Q.17
The unit of specific heat at constant pressure, Cp, in SI unit is
Q.18
If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.
Q.19
The atomic heat capacities of all solid elements __________ with decrease in temperature.
Q.20
The OH⁻ concentration in a solution having pH value 3 is
Q.21
The viscosity of water at room temperature may be around one
Q.22
Which of the following is not a unit of kinematic viscosity?
Q.23
The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be
Q.24
Cp - Cv, for an ideal gas is equal to
Q.25
With increase in temperature, the surface tension of water
Q.26
At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.
Q.27
At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
Q.28
A vapor that exists above its critical temperature is termed as a __________ vapor.
Q.29
A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be
Q.30
Pick out the wrong statement.
Q.31
Ideal solution is formed, when its components have zero
Q.32
Kinetic theory of gases stipulates that, the
Q.33
At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant?
Q.34
The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
Q.35
The heat change for the reaction, C(s) + 2S(s) → CS₂(l), is 104.2 kJ. It represents the heat of
Q.36
Which of the following ratios defines the recycle ratio in a chemical process?
Q.37
Heat of reaction is a function of the
Q.38
The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is
Q.39
Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.
Q.40
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
Q.41
Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0⁻⁵m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10⁻³. The rate of evaporation of aniline is 2.97 x 10⁻⁴. Its units are
Q.42
A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
Q.43
Volume occupied by one gm mole of a gas at S.T.P. is
Q.44
The number of H⁺ in 1 c.c solution of pH 13 is
Q.45
The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
Q.46
Equal masses of CH₄ and H₂ are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is
Q.47
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.
Q.48
40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is
Q.49
The vapor pressure of water at 100°C is
Q.50
Which of the following is not used for computing latent heat of vaporisation?
0 h : 0 m : 1 s