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- Question
With decrease in temperature, the equilibrium conversion of a reversible endother-mic reaction
Options- A. decreases
- B. increases
- C. remains unaffected
- D. increases linearly with temperature
- Correct Answer
- decreases
- 1. The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is
Options- A. 8987°K
- B. 9210°K
- C. 8764°K
- D. 8621°K Discuss
- 2. Pick out the correct statement.
Options- A. In catalytic reactions, the catalyst reacts with the reactants.
- B. A catalyst initiates a chemical reaction.
- C. A catalyst lowers the activation energy of the reacting molecules.
- D. A catalyst can not be recovered chemi cally unchanged at the end of the chemical reaction. Discuss
- 3. What is the order of a chemical reaction,
, if the rate of formation of 'C', increases by a factor of 2.82 on doubling the concentration of 'A' and increases by a factor of 9 on trebling the concentration of 'B'?
Options- A. 7/2
- B. 7/4
- C. 5/2
- D. 5/4 Discuss
- 4. __________ explains the mechanism of catalysis.
Options- A. Activated complex theory
- B. Collision theory
- C. Thermodynamics
- D. None of these Discuss
- 5. For a heterogeneous catalytic reaction
Options- A. free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction.
- B. a relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important.
- C. the catalyst does not form an intermediate complex with the reactant.
- D. the surface of the catalyst does not play an important role during reaction. Discuss
- 6. A batch reactor is suitable for
Options- A. achieving cent percent conversion of reactants into products.
- B. large scale gaseous phase reactions.
- C. liquid phase reactions.
- D. obtaining uniform polymerisation products in highly exothermic reactions. Discuss
- 7. The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 8. If the time required to complete a definite fraction of reaction varies inversely as the concentration of the reactants, then the order of reaction is
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 9. The reason why a catalyst increases the rate of reaction is that, it
Options- A. decreases the energy barrier for reaction.
- B. increases the activation energy.
- C. decreases the molecular collision diameter.
- D. none of these. Discuss
- 10. For a zero order chemical reaction, the
Options- A. half life period is directly proportion to the initial concentration of the reac-tants.
- B. plot of products concentration with time is a straight line through the origin.
- C. products concentration increases linerarly with time.
- D. all (a), (b) and (c). Discuss
Chemical Reaction Engineering problems
Search Results
Correct Answer: 9210°K
Correct Answer: A catalyst lowers the activation energy of the reacting molecules.
Correct Answer: 7/2
Correct Answer: Activated complex theory
Correct Answer: free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction.
Correct Answer: liquid phase reactions.
Correct Answer: 2
Correct Answer: 2
Correct Answer: decreases the energy barrier for reaction.
Correct Answer: all (a), (b) and (c).
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