From among the following, choose one which is not an exothermic process. Oxidation of sulphur Ammonia synthesis Catalytic cracking Methanol synthesis TRUE ANSWER : ? YOUR ANSWER : ?
Photo-chemical reactions occur in presence of Sunlight Monochromatic radiation only Darkness Solid catalysts TRUE ANSWER : ? YOUR ANSWER : ?
In a semi-batch reactor Velocity of reaction can be controlled Both the reactants flow counter-currently Maximum conversion can be controlled Residence time is constant TRUE ANSWER : ? YOUR ANSWER : ?
What is the order of a chemical reaction whose rate is deter-mined by the variation of one concentration term only? Second Zero First Third TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a controlling factor in very fast heterogeneous reaction? Composition of reactant Heat and mass transfer effects Pressure Temperature TRUE ANSWER : ? YOUR ANSWER : ?
Reaction rate of a first order reaction, which is half completed in 23 minutes will be 0.03 hr⁻¹ 0.03 min⁻¹ 0.03 sec⁻¹ 0.05 min⁻¹ TRUE ANSWER : ? YOUR ANSWER : ?
In the gaseous phase ammonia formation reaction (N₂ + 3H₂ ⇋ 2NH₃), the value of the equilibrium constant depends on the Initial concentration of N₂ and H₂ Volume of the reactor Temperature Total pressure of the system TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is an autocatalytic reaction? Photochemical reactions Enzyme fermentation reaction Microbial fermentation reaction Ammonia synthesis reaction TRUE ANSWER : ? YOUR ANSWER : ?
A catalyst is said to be a negative catalyst, ifit Reduces the value of equilibrium constant Retards the rate of reaction All of these Does not initiate the reaction TRUE ANSWER : ? YOUR ANSWER : ?
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase Desorption of C Surface reaction between A in the gas phase and absorbed B Surface reaction between absorbed A and absorbed B TRUE ANSWER : ? YOUR ANSWER : ?