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Question
Select the correct alternative from the choices given :
A catalyst is a substance which:
Options
changes the equilibrium constant of the reaction
increases the equilibrium constant of the reaction
supplies energy to the reaction
shortens the time reach equilibrium
Solution
shortens the time reach equilibrium
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RELATED QUESTIONS
Match the following:
(i) Diazotisation (a) Anisotropic
(ii) Crystalline solid (b) Reimer-Tiemann reaction
(iii) Phenol (c) Diphenyl
For a reaction , A + B → C+D the initial rate for different reactions and initial concentrations of reactants are given below:
| S.NO. | Initial Conc. | Initial rate (mole L–1 sec–1) | |
| [ A] mole L–1 | [B] mole L–1 | ||
| 1 | 1.0 | 1.0 | `2xx10^-3` |
| 2 | 2.0 | 1.0 | `4xx10^-3` |
| 3 | 4.0 | 1.0 | `8xx10^-3` |
| 4 | 1.0 | 2.0 | `2xx10^-3` |
| 5 | 1.0 | 4.0 | `2xx10^-3` |
(i) What is the overall order of reaction?
(ii) Write the rate law equation.
25% of first order reaction is completed in 30 minutes. Calculate the time taken in minutes for the reaction to go to 90% completion.
