ECAT Chemistry Reaction Kinetics Test Online

Chemistry Reaction Kinetics MCQS Online Test

ECAT Chemistry Reaction Kinetics Chapter Online Test

Total Questions: 165
Time Allowed: 60 Minutes
Total Marks: 165
How to Attempt Test: Please choose the right Option in MCQ-type question.
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ECAT Chemistry Reaction Kinetics Test

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Chemistry

1. The half-lives of 2 samples are 0.1 and 0.4 seconds. Their initial conc. Are 200 and 50 respectively? What is is the order of the reaction?

2. 4 moles of A re mixed with 4 moles of B, when 2 moles of C are formed at equilibrium according to the reaction A + B ⇌ C + D The value of equilibrium constant is

3. The unit of rate constant for a zero order reaction is

4. A chemical reaction is catalyzed by X. Hence X

5. A solution with pH = 0, its H⁺ ion concentration is

6. A zero order reaction is one whose rate is independent of

7. Initially the rate to increase in concentration of products in a reaction is

8. The unit of ionic product of H₂O is

9. Which of the following will not change the concentration of ammonia at the equilibrium?

10. 1.1 mol of A is mixed with 2.2 mol of B and the mixture is kept in one liter flask till the equilibrium is reached. At equilibrium, 0.2 mol of C is formed. If the equilibrium reaction is A + 2B 2C + D, the value of equilibrium constant is

11. The amount of ₅₃I¹²⁸, (I₃₆ = 25 min) left after 50 min is

12. The average rate and instantaneous rate of a reaction are equal

13. The activation energy for a reaction is 90 keal mol¯¹ the approximate increase in rate constant, when it’s temp is increased from 300K to 310K is

14. The firs order rate constant of decomposition of N₂S₅ is 6.2 x 10¯⁴ sec. The initial pressure is 290 mm Hg and final is 360 mmHg. t/2 is

15. Ammonium carbonate when heated to 200°C gives a mixture of NH₃ and CO₂ vapour with a density of 13.0. what is the degree of dissociation of ammonia carbonate?

16. Of the following, which change will shift the reaction towards the product? I₂(g) ⇌ 2I(g) ∆H°t(298 K) = + 150 kJ

17. 4.5 moles each of hydrogen and iodine heated in a sealed ten liter vessel. At equilibrium 3 moles of HI were found. The equilibrium constant for H₂(g) + I₂(g) ⇌ 2HI(g) is

18. Rate constant is case of first order reaction is

19. Effect of temperature on reaction rate is given by

20. The equilibrium constant Kᵨ for the reaction PCl₅(g) ⇌ PCl₃(g) + CI₂(g) is 16. If the volume of the container is reduced to half of its original volume, the value of Kᵨ for the reaction at the same temperature will be

21. The compounds A and B are mixed in equimolar proportion to form the products, A + B ⇌ C + D. At equilibrium, one third of A and B are consumed. The equilibrium constant for the reaction is

22. 75% of a first order reaction was completed in 32 minutes. When was 50% of the reaction completed?

23. 0.1 M HCl has pH = 1..1, it is about 100 times stronger acid, pH of acetic acid is

24. Large the surface area of the reactant molecules

25. For the reaction PCl₅(g) ⇌ PCl₃(g) + Cl²(g) the forward reaction at constant temperature is favoured by


 

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