DELHI SCHOOL TEACHERS FORUM

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CLASS -12 CHEMISTRY (CHEMICAL KINETICS) Molecularity of Reaction, Order of Reaction, How to solve Numerical, Differential Rate of Equation v/s Integrated rate of Equations, Life time Period. Test based on the class held on 21/07/2020

NAME OF STUDENT & Roll No. *

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NAME OF TEACHER *

1. What can't be values of Molecularity for X+(1/2)Y → 5Z reaction ? *

1 point

1.5

2. Which of the following statement is correct ? *

1 point

Rate of reaction can not be expressed as change in Conc. of reactant w.r.t. time.

Rate of reaction can not be expressed as change in Conc. of Product w.r.t. time.

Rate of reaction can not be expressed as change in number of moles of reactant as well as product w.r.t. time.

Rate of reaction can be expressed as change in Concentration of reactant as well as product w.r.t. time.

3. Which of the following statement is correct ? *

1 point

(a) Order of reaction is always a Zero number.

(b) Molecularity of a reaction is always is in fraction.

(d) Complex reaction take place in single step.

4. A reaction 3A → 5B has a rate constant of 0.005 min-1. What will be rate becomes when the concentration of A is increases to 3 times. *

1 point

(a) becomes 3 times.

(b) becomes 9 times.

(d) Remain same

5. Consider the reaction X → 2Y . p = rate of disappearance of Reactant. q = Rate of Appearance of Product. then select the correct option. *

1 point

(a) p>q

(b) p<q

(d) Cannot predict

6. In the combustion of methane, CH4(g) + 2 O2(g) → CO2(g) + 2 H2O (g), which reactant has the greatest rate of disappearance? *

1 point

a. CH4

b. O2

c. CO2

d. H2O

e. CH4 and O2 have the same rate of disappearance.

7. Which of the following is not a possible graph of concentration versus time for a reactant? *

1 point

8. For the reaction A + 3B → 2C, how does the rate of disappearance of B compare to the rate of production of C? *

1 point

a. the rate of disappearance of B is 1/2 the rate of appearance of C

b. the rate of disappearance of B is 3/2 the rate of appearance of C

c. the rate of disappearance of B is 2/3 the rate of appearance of C

d. the rate of disappearance of B is 1/3 the rate of appearance of C

9. Which of the following statements is correct? *

1 point

a. The rate of a reaction decreases with passage of time as the concentration of reactants decreases.

b. The rate of a reaction is same at any time during the reaction.

c. The rate of a reaction is independent of temperature change.

d. The rate of a reaction decreases with increase in concentration of reactant(s).

10. Which of the following statements is not correct about order of a reaction. *

1 point

a. The order of a reaction can be a fractional number.

b. Order of a reaction is experimentally determined quantity.

c. The order of a reaction is always equal to the sum of the stoichiometric coefficients of reactants in the balanced chemical equation for a reaction.

d. The order of a reaction is the sum of the powers of molar concentration of the reactants in the rate law expression.

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