Question Answers

All energetically effective collisions do not result in a chemical change. Explain with the help of an example. All energetically effective collisions do not result in a chemical change. Explain with the help of an example. June 3, 2021 Category: Chemistry , NCERT Exemplar Class 11 ,

Assertion (A) Rate constant determined form Arrhenius equations are fairly accurate for simple as well as complex molecules. Reason (R) Reactant molecules undergo chemical irrespective of their orientation during collision. Assertion (A): Order of the reaction can be zero or fractional · Reason (R): We cannot determine order from balanced chemical equation · June 3, [...]

Assertion (A) : The enthalpy of reaction remains constant in the presence of a catalyst. Reason (R) : A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same. Assertion (A): Order of the reaction can be zero [...]

Assertion: All collisions of reactant molecules lead to product formation. Reason: Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formations. Assertion (A): Order of the reaction can be zero or fractional · Reason (R): We cannot determine order from balanced chemical equation · June 3, 2021 Category: [...]

Assertion: Order and molecularity are same. Reason: Order is determined experimentally and molecularity is the sun of the stoichiometric coefficient of rate determining elementary step. Assertion: Order and molecularity are same. Reason: Order is determined experimentally and molecularity is the sun of the stoichiometric coefficient of rate determining elementary step. June 3, 2021 Category: Chemistry [...]

Assertion (A): Order of the reaction can be zero or fractional · Reason (R): We cannot determine order from balanced chemical equation · Assertion (A): Order of the reaction can be zero or fractional · Reason (R): We cannot determine order from balanced chemical equation · June 3, 2021 Category: Chemistry , NCERT Exemplar Class [...]

At time t = 0 initial mode of a = 1. Overall half life of reaction is 15 days. Then calculate the number of mole of C after 45 days if the ratio of k1 : k2 : k3 : is 4 : 2 : 1 At time t = 0 initial mode of a [...]

Half-life for the zero order reaction A(g)→B(g)+C(g) and half-life for the first order reaction X(g)→Y(g)+Z(g) are equal. If completion time for the zero order reaction is 13.86 min, then calculate the rate constant ( in hr^-1) of the reaction X(g)+→Y(g)+Z(g). Half-life for the zero order reaction A(g)→B(g)+C(g) and half-life for the first order reaction X(g)→Y(g)+Z(g) [...]

For a reaction, A⇌B equilibrium constant is 1.66 and k forward = 0.166 hr^-1. Calculate the time (in hours) when concentration of B is 80% of its equilibrium concentration. (Given: ln 25 = 320). A⇌B equilibrium constant is 1.66 and k forward = 0.166 hr^-1. Calculate the time (in hours) when concentration of B is [...]

Carbon monoxide reacts with O2 to form CO2: 2CO(g)+O2(g)→2CO2(g) Informations about this reaction are given in the table below. What is the value for the rate constant for the reaction in properly related unit? Select the correct statement(s) : (a) When T gives infinite or Ea gives 0 then k = A June 3, 2021 [...]