Chemistry questions
29404 published questions with worked solutions.
- The rate for the 1st order reaction is 0.69 10^ -2 mol ,L^ -1 ,min^ -1 and the initial concentration is 0.2 mol ,L^ -1 . The half...
- For the first order reaction, plot of _ 10 (a-x) against time ‘t’ is a straight line with a negative slope equal to ________
- The rate of a chemical change at constant temperature is directly proportional to ________
- Time taken for completion of a zero order reaction is _________ (‘a’ is initial concentration, x is the amount decomposed at time...
- Thermal decomposition of a compound is 1st order reaction. If a sample of compound decomposes 50% in 120 minutes, how much time...
- In a reaction, when the concentration of reactant is increased two times and three times then, the increase in rate of reaction...
- After how many seconds will the concentration of the reactants in a first order reaction be halved, if the rate constant is 1.155...
- The reaction 2NO_ (g) +O_ 2(g) 2NO_ 2(g) is of first order. If volume of reaction vessel is reduced to 1/3, the rate of reaction...
- The rate law for the reaction, RCl+NaOH_ (aq) ROH+NaCl is given by Rate =k[ RCl ] The rate of the reaction will be _______
- The integrated rate equation is kt= C_0- C_t. The straight line graph is obtained by plotting ________
- The rate constant and rate of reaction have units that are ________
- Diazonium salt decomposes as C_6H_5N_2^+Cl^- C_6H_5Cl+N_2 at 0°C. The evolution of N_2 becomes two times faster when initial...
- Which of the following stands TRUE for molecularity of a reaction?
- The reaction between NO and Cl_2 written as 2NO+Cl_2 2NOCl is found to follow third order kinetics. Its molecularity is _______
- Energy of activation of an exothermic reaction is _______
- In a hypothetical reaction X Y , the activation energy for the forward and backward reaction are 15 and 9 kJ ,mol^ -1...
- The rate constant (k') of one of the reaction is found to be double that of the rate constant (k'') of another reaction. Then the...
- Collision theory is applicable to ______ reactions
- If x is the fraction of molecules having energy greater than E_a the relation between the two will be given by ______________
- The rate constant is given by the equation k=pze^ -E_a/RT . Which factor should register a decrease for the reaction to proceed...