JEE Questions for Chemistry Chemical Kinetics Quiz 9 - MCQExams.com

A + 2B → C + D For a reaction from following data correct rat law
Chemistry-Chemical Kinetics-1747.png
  • Rate = K [A]2[B]
  • Rate = K [A]2[B]2
  • Rate = K [A][B]2
  • Rate = K [A][B]
In the reaction A + B → Products, the doubling of [A], increases the reaction rate to four times, but doubling of [B] has no effect on the reaction rate. The rate expression is ....
  • Rate = K [A]2
  • Rate = K[A]
  • Rate = K [A]2[B]2
  • Rate = K [A][B]
A zero order reaction is one whose rate is independent of ....
  • Reaction vessel volume
  • Concentration of reactants
  • temperature
  • pressure of light
The rate constant of a reaction changes when ...
  • pressure is changed
  • concentration of reactants changed
  • temperature is changed
  • a catalyst is added
Which of the following is a reaction of fractional order ?

  • Chemistry-Chemical Kinetics-1748.png
  • 2)
    Chemistry-Chemical Kinetics-1749.png

  • Chemistry-Chemical Kinetics-1750.png

  • Chemistry-Chemical Kinetics-1751.png
When concentration of reactant is increased eighteen times the rate becomes two times, the rate of reaction is
  • 1
  • 1/2
  • 1/3
  • 1/4
The rate determining step in a reaction is A + 2B → C. Doubling the concentration of B would make the reaction rate...
  • two times
  • same rate
  • four times
  • 1/4 times
If the order of reaction is zero. It means that
  • rate of reaction is independent of temperature
  • rate of reaction is independent of the concentration of the reacting species
  • the rate of formation of activated complex is zero
  • the rate of decomposition of activated complex is zero
The reactions of higher order are rare because
  • many bady collisions involve very high activation energy
  • many bady collisions have a low probability
  • many bady collisions are not energetically favoured
  • many bady collisions can take place only in the gaseous phase.

Chemistry-Chemical Kinetics-1753.png

  • Chemistry-Chemical Kinetics-1754.png
  • 2)
    Chemistry-Chemical Kinetics-1755.png

  • Chemistry-Chemical Kinetics-1756.png

  • Chemistry-Chemical Kinetics-1757.png

Chemistry-Chemical Kinetics-1758.png
  • 1.5
  • 2
  • 0
  • 1
In the reaction A → B. When the concentration of A is changed from 0.1 M to 1 M, the rate of reaction increases by a factor of 100. The order of reaction with respect to A is ....
  • 10
  • 1
  • 2
  • 3
For the reaction of A + B → C + D, doubling the concentration of both the reactants increases the reaction rate by 8 times and doubling the initial concentration of only B simply doubles the reaction rate. The rate law for the reaction is
  • r = K [A][B]2
  • r = K [A][B]
  • r = K [A]1/2[B]
  • r = K [A]2[B]
The unit of rate constant for a zero order reaction is ...
  • litre sec-1
  • litre mole-1 sec-1
  • mole litre-1 sec-1
  • mole sec-1
The dimensions of the rate constant of a third order reaction involve.
  • only time
  • time and concentration
  • time and square of concentration
  • only concentration
Which of the following statements is incorrect about the molecularity of a reaction ?
  • Molecularity of a reaction is the number of molecules in the slowest step.
  • Molecularity of a reaction is the number of molecules of the reaction present in the balanced equation.
  • There is no difference between order and molecularity of a reaction.
  • Molecularity is always a positive whole number.
Which of the following statement is false ?
  • For a zero order reaction, the rate changes with temperature.
  • Both order and molecularity of a reaction are always the same.
  • Active mass of 128 g of HI present in a two litre flask is 0.5.
  • For the first order reaction, the rate of reaction halved as the concentration of a reactant halved.
If ‘a’ is the initial concentration of the reactant, the time taken for completion of the reaction, it if is of zero order, will be

  • Chemistry-Chemical Kinetics-1763.png
  • 2)
    Chemistry-Chemical Kinetics-1764.png

  • Chemistry-Chemical Kinetics-1765.png

  • Chemistry-Chemical Kinetics-1766.png

Chemistry-Chemical Kinetics-1768.png

  • Chemistry-Chemical Kinetics-1769.png
  • 2)
    Chemistry-Chemical Kinetics-1770.png

  • Chemistry-Chemical Kinetics-1771.png

  • Chemistry-Chemical Kinetics-1772.png
For reaction of zero order is ...

  • Chemistry-Chemical Kinetics-1774.png
  • 2)
    Chemistry-Chemical Kinetics-1775.png

  • Chemistry-Chemical Kinetics-1776.png

  • Chemistry-Chemical Kinetics-1777.png
For reaction first order is ...

  • Chemistry-Chemical Kinetics-1779.png
  • 2)
    Chemistry-Chemical Kinetics-1780.png

  • Chemistry-Chemical Kinetics-1781.png

  • Chemistry-Chemical Kinetics-1782.png
For the reaction Zero order

  • Chemistry-Chemical Kinetics-1784.png
  • 2)
    Chemistry-Chemical Kinetics-1785.png

  • Chemistry-Chemical Kinetics-1786.png

  • Chemistry-Chemical Kinetics-1787.png
For reaction first order

  • Chemistry-Chemical Kinetics-1789.png
  • 2)
    Chemistry-Chemical Kinetics-1790.png

  • Chemistry-Chemical Kinetics-1791.png

  • Chemistry-Chemical Kinetics-1792.png
Which of the following represents the expression for 3⁄4th life of a first order reaction

  • Chemistry-Chemical Kinetics-1794.png
  • 2)
    Chemistry-Chemical Kinetics-1795.png

  • Chemistry-Chemical Kinetics-1796.png

  • Chemistry-Chemical Kinetics-1797.png
For the first order reaction, half life is 14 s. The time required for the initial concentration to reduce to 1/8 th of its value is ...
  • 28 s
  • 42 s
  • (14)2 s
  • (14)3 s

Chemistry-Chemical Kinetics-1800.png
  • 0.63 g
  • 0.5 g
  • 1.77 g
  • 1.25 g
In the first order reaction 75% of reactant disappeared in 1.386 h. Calculate the rate constant of reaction.

  • Chemistry-Chemical Kinetics-1802.png
  • 2)
    Chemistry-Chemical Kinetics-1803.png

  • Chemistry-Chemical Kinetics-1804.png

  • Chemistry-Chemical Kinetics-1805.png
Which of the following does not affect the rate of reaction ?
  • size of the vessel
  • physical state of reactants
  • amount of the reactants
  • ∆H of reaction
For an exothermic reaction an activation energy of 70 KJ mole-1 and the enthalpy change of reaction is 30 KJ mole-1. The activation energy for the reverse reaction is ...
  • 70 KJ mole-1
  • 30 KJ mole-1
  • 40 KJ mole-1
  • 100 KJ mole-1
The rate constant of the reaction increases by ...
  • increasing the temperature
  • increasing the concentration of reactants
  • carrying out the reaction for longer period
  • adding catalyst
0:0:1


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