Related Questions

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these
A catalyst in a chemical reaction __________ free energy change in the reaction.
A Increases
B Decreases
C Either A or B; depends on the type of catalyst
D Neither A nor B
A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
A Catalytic
B Autocatalytic
C Photochemical
D None of these
The reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
A Biochemical
B Photochemical
C Catalytic
D Autocatalytic
Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.
A Proportional to
B Independent of
C Inversely proportional to
D Proportional to the square of
Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)
A Tan hT/T
B Tan T/T
C Tan hT/tan T
D None of these
For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison.
A (i) platinum (ii) sulphur
B (i) palladium (ii) oxygen
C (i) nickel (ii) sulphur
D (i) nickel (ii) oxygen
The equilibrium constant of a catalytic chemical reaction __________ due to the presence of a catalyst.
A Increases
B Decreases
C Remains unaffected
D Unpredictable from the data
The equilibrium constant of chemical reaction __________ in the presence of catalyst.
A Increases
B Decreases
C Remains unaffected
D Can either increase or decrease (depends on the type of catalyst)
For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.
A Physical
B Chemical
C Both A and B
D Neither A nor B

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