Chemistry questions
29404 published questions with worked solutions.
- If a is the initial concentration and K is the rate constant of a zero order reaction, the time for reaction to go to completion...
- For a given reaction half-life period was found to be directly proportional to the initial concentration of the reaction. The...
- The number of molecules of the reactants taking part in a single step reaction tells about
- The activation energy of exothermic reaction A B is 80 KJ. The heat of reaction is 200 KJ. The activation energy for the reaction...
- On addition of AgNO_3 to NaCl, White ppt. occurs
- Which of the following is a first order reaction?
- The rate of the first order reaction X products is 0.75 10^ -4 , mol ,L^ -1 ,Mins^ -1 when the concentration of X is 0.5 , Mol...
- The enzyme catalyst reaction is faster than metal catalyzed reaction because its activation energy isNot in JEE Main or NEET syllabus
- Ethyl acetate is hydrolyzed in acidic medium. Its order of reaction and molecularity are respectively :
- For the reaction N_2 + 3H_2 2NH_3. The rate of change of concentration for hydrogen is -0.3 10^ -4 ,M ,S^ -1 . The rate of change...
- Rate of chemical reaction can be kept constant by
- An endothermic reaction A B has an activation energy as X KJ Mol^ -1 of A. If energy change of the reaction as Y KJ, the...
- Which one of the following formula represents the first order reaction?
- For the equilibrium 2NO_ 2(g) N_2O_ 4(g) + 14.6 ,Kcal Increase of temperature could
- For a first order reaction, the ratio of times to complete 99.9% and half of the reaction is
- For a single step reaction : A + 2B product the Molecularity is
- In the first order reaction 75% of the reactant disappeared in 1.386 h. Calculate the rate constant of reaction.
- The minimum energy required for molecules to enter into chemical reaction is called
- Which of the following represents the expression for 3/4^ th of concentration remaining of a first order reaction?
- The chemical reaction in which reactants require high amount of activation energy are generally