Chemical Engineering GATE 2012 Questions with Answer

Ques 1 Chemical Engineering Thermodynamics

In a throttling process, the pressure of an ideal gas reduces by 50%. If C_P and C_v are the heat capacities at constant pressure and constant volume, respectively (γ=C_p/C_V), the specific volume will change by a factor of

Ques 2 Chemical Engineering Thermodynamics

If the temperature of saturated water is increased infinitesimally at constant entropy, the resulting state of water will be

Ques 3 Chemical Engineering Thermodynamics

In a parallel flow heat exchanger operating under steady state, hot liquid enters at a temperature T_h,in and leaves at a temperature T_h,out. Cold liquid enters at a temperature T_c,in and leaves at a temperature T_c,out. Neglect any heat loss from the heat exchanger to the surrounding. If T_h,in>>T_c,in then for a given time interval, which ONE of the following statements is true?

Ques 4 Chemical Engineering Thermodynamics

For an exothermic reversible reaction, which one of the following correctly describes the dependence of the equilibrium constant (K) with temperature (T) and pressure (P)?

Ques 5 Chemical Engineering Thermodynamics

An insulated, evacuated container is connected to a supply line of an ideal gas at pressure P_s, temperature T_s and specific volume v_s. The container is filled with the gas until the pressure in the container reaches P_s. There is no heat transfer between the supply line to the container, and kinetic and potential energies are negligible. If C_p and C_V are the heat capacities at constant pressure and constant volume, respectively (γ=C_p/C_v), then the final temperature of the gas in the container is

Ques 6 Chemical Engineering Thermodynamics

Consider a binary liquid mixture at constant temperature T and pressure P. If the enthalpy change of mixing, ΔH=5x₁x₂, where x₁ and x₂ are the mole fraction of species 1 and 2 respectively, and the entropy change of mixing ΔS=-R[x₁ln x₁+x₂ln x₂] (with R=8.314 J/mol.K), then the minimum value of the Gibbs free energy change of mixing at 300 K occurs when

Ques 7 Chemical Reaction Engineering

The half-life of an n^th order reaction in a batch reactor depends on

Ques 8 Chemical Reaction Engineering

Consider the reaction scheme shown below
A ↔ B ↔ C.
Both the reactions are first-order. The activation energies for k₁ and k₂ are 80 and 20 kJ/mol respectively. To maximize the yield of B, it is preferable to use

Ques 9 Chemical Reaction Engineering

The rate-controlling step for the solid-catalyzed irreversible reaction A+B⟶C is known to be the reaction of adsorbed A with adsorbed B to give adsorbed C. If P_i is the partial pressure of component i and K_i is the adsorption equilibrium constant of component i, then the form of the Langmuir-Hinshelwood rate expression will be

Ques 10 Chemical Reaction Engineering

The elementary reversible exothermic gas-phase reaction A+3B ↔ 2C is to be conducted in a non-isothermal, non-adiabatic plug flow reactor. The maximum allowable reactor temperature is T_max. To minimize the total reactor volume, the variation of reactor temperature (T) with axial distance from the inlet (z) should be

Ques 11 Chemical Reaction Engineering

The first order liquid phase reaction A→P is conducted isothermally in a plug flow reactor of 5 liter volume. The inlet volumetric flow rate is 1 liter/min and the inlet concentration of A is 2 mole/liter. If the exit concentration of A is 0.5 mole/liter, then the rate constant, in min^-1, is

Ques 12 Chemical Reaction Engineering

The first order liquid phase reaction A→P is conducted isothermally in a plug flow reactor of 5 liter volume. The inlet volumetric flow rate is 1 liter/min and the inlet concentration of A is 2 mole/liter. The plug flow reactor is replaced by 3 mixed flow reactors in series, each of 2.0 liters volume. The exact conversion of A (in %) is

Ques 13 Chemical Technology

In petroleum refining, catalytic reforming is used to convert