Chemical Engineering GATE 2010 Questions with Answer

Ques 1 Chemical Engineering Thermodynamics

The Maxwell-Boltzmann velocity distribution for the x-component of the velocity, at temperature T, is f(v_x)=√(m/(2πkT))exp(-mv_x²/(2kT)). The standard deviation of the distribution is

Ques 2 Chemical Engineering Thermodynamics

An equimolar liquid mixture of species 1 and 2 is in equilibrium with its vapour at 400 K. At this temperature, the vapour pressures of the species are P₁^sat=180 kPa and P₂^sat=120 kPa. Assuming that Raoult's law is valid, the value of y₁ is

Ques 3 Chemical Engineering Thermodynamics

A new linear temperature scale, denoted by °S, has been developed, where the freezing point of water is 200°S and the boiling point is 400°S. On this scale, 500°S corresponds. in degrees Celsius, to

Ques 4 Chemical Engineering Thermodynamics

A saturated liquid at 1500 kPa and 500 K, with an enthalpy of 750 kJ/kg. is throttled to a liquid-vapour mixture at 150 kPa and 300 K. At the exit conditions, the enthalpy of the saturated liquid is 500 kJ/kg and the enthalpy of the saturated vapour is 2500 kJ/kg. The percentage of the original liquid, which vaporizes, is

Ques 5 Chemical Engineering Thermodynamics

At constant T and P, the molar density of a binary mixture is given by ρ=1+x₂ where x₁ is the mole fraction of component 2. The partial molar volume at infinite dilution for component I, ‾V₁^∞ is

Ques 6 Chemical Reaction Engineering

For a first order isothermal catalytic reaction, A→P. occurring in an infinitely long cylindrical pore, the relationship between effectiveness factor, ε, and Thiele modulus φ is

Ques 7 Chemical Reaction Engineering

Two reactors (reactor 1 and reactor 2) with average residence times, τ₁ and τ₂ respectively. are placed in series. Reactor 1 has zero dispersion and reactor 2 has infinite dispersion. The residence-time distribution. E(t) of this system. is given by

Ques 8 Chemical Reaction Engineering

An autocatalytic liquid phase reaction. A+R→2R is conducted in an isothermal batch reactor with a small initial concentration of R. Assume that the order of reaction with respect to both reactants is positive. The rate of reaction (-r_A) versus concentration, C_A, as the reaction proceeds, is depicted by

Ques 9 Chemical Reaction Engineering

A liquid phase reaction, A→B, is conducted isothermally in a CSTR having a residence time of 2 s. The inlet concentration of species A is 2 moles/litre, and the outlet concentration is 1 mole/litre. The rate law for the reaction is -r_A=kC_A/(K+C_A) where k=5 moles/litre/s.
The value of K, in moles/litre, is

Ques 10 Chemical Reaction Engineering

A liquid phase reaction, A→B, is conducted isothermally in a CSTR having a residence time of 2 s. The inlet concentration of species A is 2 moles/litre, and the outlet concentration is 1 mole/litre. The rate law for the reaction is -r_A=kC_A/(K+C_A) where k=5 moles/litre/s.
If the same reaction is conducted in a series of two CSTRs with residence times 1 s and 0.2 s. then the inlet concentration of A, in moles/litre, required to attain an outlet concentration of A of 1 mole/litre, is

Ques 11 Chemical Technology

In the manufacture of caustic soda from brine, which ONE of the following statements is TRUE?

Ques 12 Chemical Technology

For making superphosphate by acidulation of phosphate rock, use of nitric acid is desirable, because

Ques 13 Chemical Technology

Match the processes in Group 1 with the products in Group II.
GROUP 1
P. Claus process
Q. Linde process
R. Lurgi process
GROUP II
I. Syngas
II. Oxygen
III. Sulphur