Chemistry questions
29404 published questions with worked solutions.
- The hydrolysis of ethyl acetate CH_3COOC_2H_5 H^+ CH_3COOH + C_2H_5OH is
- In hydrolysis of organic chloride with excess of water RCl + H_2O ROH + HCl Molecularity and order of reaction is
- The concentration of a reactant in a solution falls (i) from 0.2 to 0.1 M in 2 hrs. (ii) from 0.2 to 0.05 M in 4 hrs. The order...
- Certain bimolecular reaction which follows the Kinetics of first order are called
- The hydrolysis of ethyl acetate was carried out separately with 0.05 M HCl and 0.05 M H_2SO_4. The rate constants were found to...
- The logarithmic of rate constant of a reaction
- If [A] is the concentration of A at any time t and [A_0] is the concentration at t = 0, then for the first order reaction, the...
- A first order reaction takes 100 min for completion of 60% of reaction. The time required for completion of 90% of the reaction is
- A first order reaction has specific rate constant of 2 min^ -1 . The half-life of this reaction will be
- The ratio of the times 99.9% of the reaction to complete and half of the reaction to complete is
- Arrhenius equation is
- If initial concentration is reduced to 1/4th in a zero order reaction, the time taken for half the reaction to complete
- For the order reaction the half life period is (if k is rate constant and is initial concentration)
- For a first order reaction we have k = 100 s^ -1 . The time for completion of 50% reaction is
- The influence of temperature on reaction rate is predicted by
- The half-life period of a first order reaction is
- The half-life period for a first order reaction is 69.3. Its rate constant is
- Which order reaction obeys the expression t_ 1/2 = 1 Ka
- The time for half life of a first order reaction is 1 hr. What is the time taken for 87.5% completion of the reaction?
- The half-life period for a first order reaction is 693 seconds. The rate constant for this reaction would be