Q.1
For a chemical reaction, A → B, the rate of reaction increases by factor of 2.25 when the concentration of A is increased by 1.5 times. The order of reaction with respect to A is
  • a) 1.5
  • b) 2
  • c) 2.5
  • d) 3
Q.2
The rate of the reaction, A + B + C → Products, is given by The order of the reaction is
ch-11_que_no-103_img_no1.png
  • a) 1/2
  • b) 13/12
  • c) 1
  • d) 2
Q.3
Assertion Formation of HI is a bimolecular reaction Reason Two molecules of reactants are involved in this reaction
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.4
In the reaction 3A → 2B, the rate of reaction of B is equal to
  • a)
    ch-11_qn-106choice_img_no1.png
  • b)
    ch-11_qn-106choice_img_no2.png
  • c)
    ch-11_qn-106choice_img_no3.png
  • d)
    ch-11_qn-106choice_img_no4.png
Q.5
version of cane sugar is represented by C12H22O11 + H2O → C6H12O6 + C6H12O6 It is a reaction of ... [ MPPMT 1993]
  • a) zero order
  • b) first order
  • c) pseudo-unimolecular
  • d) unimolecular
Q.6
The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation k=Ae-Ea/RT. Activation energy (Ea) of the reaction can be calculated by plotting ...[ AIIMS 2007]
  • a) log k vs T
  • b) log k vs 1/T
  • c) k vs T
  • d) k vs 1/logT
Q.7
In a first order reaction, the concentration of the reactant, decreases from 0.5M to 0.4M in 15 minutes. The time taken for the concentration to change from 0.1M to 0.025M is
  • a) 15 min
  • b) 30 min
  • c) 7.5 min
  • d) 60 min
Q.8
Consider the reaction, N2(g) +3 H2(g) → 2NH3(g) The equality relationship between following is [CBSE 2006]
ch-11_que_no-110_img_no1.png
  • a)
    ch-11_qn-110choice_img_no1.png
  • b)
    ch-11_qn-110choice_img_no2.png
  • c)
    ch-11_qn-110choice_img_no3.png
  • d)
    ch-11_qn-110choice_img_no4.png
Q.9
ssertion: Half-life of a first -order reaction is equal to 0.693/k, where 'k' is the rate constant of the reaction Reason For a first order reaction t3/4 = 2×t1/2
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.10
The temperature coefficient of most of the reactions lies between
  • a) 2 and 3
  • b) 1 and 2
  • c) 2 and 4
  • d) 3 and 4
Q.11
The rate of the reaction CCl3 - CHO + NO → CHCl3 + NO + CO is given by the equation, rate =k[CCl3CHO][NO]. If the concentration is expressed in mol L-1, the unit of k are ...[ MPPMT 1993]
  • a) mol-2 L2 s-1
  • b) mol L-1 s-1
  • c) L mol-1 s-1
  • d) sec-1
Q.12
ssertion The rate of chemical reaction increases as the temperature is increased Reason The collision frequency between the reactant molecules increases on increasing temperature
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.13
Consider a reaction, A → B + C. If the initial concentration of A was reduced from 2M to 1M in 1 hour and from 1M to 0.25M in 2 hours, the order of the reaction is ..
  • a) 0
  • b) 1
  • c) 2
  • d) 3
Q.14
According to Arrhenius equation, rate constant of a chemical reaction is equal to ....
  • a)
    ch-11_qn-116choice_img_no1.png
  • b)
    ch-11_qn-116choice_img_no2.png
  • c)
    ch-11_qn-116choice_img_no3.png
  • d)
    ch-11_qn-116choice_img_no4.png
Q.15
The rate of reaction was found to be equal to its rate constant at any concentration of the reactant. The order of the reaction is ...[ AIIMS 1995]
  • a) zero order
  • b) first order
  • c) second order
  • d) third order
Q.16
Assertion The hydrolysis of methyl acetate by dil HCl is a pseudo first order reaction Reason HCl acts as a catalyst for the hydrolysis
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.17
According to collision theory of reaction ...
  • a) every collision between reactant molecules leads to a chemical reaction
  • b) rate of reaction is proportional to the velocity of the molecules
  • c) rate of reaction is proportional to the average energy of the molecules
  • d) rate of reaction is proportional to the number of collisions per second
Q.18
Half-life of a first order reaction is 10 min. What % of reaction will be completed in 100 min?
  • a) 25%
  • b) 50%
  • c) 80%
  • d) 99.9%
Q.19
3A → B + C It would be a zero order reaction when ...[ CBSE 2002]
  • a) the rate of reaction is proportional to square of concentration of A
  • b) the rate of reaction remains same at any concentration of A
  • c) the rate remains unchanged at any concentration of B and C
  • d) the rate of reaction doubles if concentration of B is increased to double
Q.20
A substance reacts with initial concentration of a mol dm-3, according to zero order kinetics. the time it takes for the completion of reaction is : (k=rate constant, r0 initial concentration) [KCET 2006]
  • a) k/R0
  • b) R0/2k
  • c) R0/k
  • d) kR0
Q.21
The rate of reaction depends upon .... [ BHU 2000]
  • a) molar concentration
  • b) atomic mass
  • c) equivalent mass
  • d) none of these
Q.22
At 500K, the half-life period of a gaseous reaction at an initial pressure of 80 kPa is 350 sec. When the pressure is 40 kPa, the half-life period is 175 sec; the order of the reaction is
  • a) zero
  • b) one
  • c) two
  • d) two and half
Q.23
For the reaction 2A+B → 3C + D, which of the following does not express the reaction rate ...[ CBSE 2006]
  • a)
    ch-11_qn-126choice_img_no1.png
  • b)
    ch-11_qn-126choice_img_no2.png
  • c)
    ch-11_qn-126choice_img_no3.png
  • d)
    ch-11_qn-126choice_img_no4.png
Q.24
he rate of reaction between A and B increases by a factor of 100, when the concentration of A is increased 10 folds. The order of reaction with respect to A is ...
  • a) 2
  • b) 1
  • c) zero
  • d) 10
Q.25
The activation energy of exothermic reaction A → B is 80kJmol-The heat of reaction is 200kJmol-The activation energy for the reaction B →A (in kJ/mol) will be
  • a) 40
  • b) 80
  • c) 200
  • d) 280
Q.26
Activation energy of the reaction is ...
  • a) the energy released during the reaction
  • b) the energy evolved when activated complex is formed
  • c) minimum amount of energy needed to overcome the potential barrier
  • d) the energy needed to form one mole of the product
Q.27
In the first order reaction, the concentration of reaction is reduced to 25% in one hour. The half life period of the reaction is ...[ AFMC 2005]
  • a) 1/4 hr
  • b) 1/2 hr
  • c) 2 hrs
  • d) 4 hrs
Q.28
The half-life period of a first order reaction is 1 min 40 seconds. Calculate its rate constant.
  • d) 1.93× 103 sec
  • a) 6.93 × 10⁻³ min-1
  • b) 6.93 × 10⁻³ sec-1
  • c) 1.93× 10⁻³ sec
Q.29
ssertion k= Ae-Ea/RT, the Arrhenius equation represents the dependence of rate constant with temperature Reason Plot of log K against 1/T is linear and the activation energy can be calculated with this plot
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.30
For a chemical reaction A → B, the rate of reaction doubles when the concentration of A is increased four times. The order of reaction for A is ...[ BHU 1995]
  • a) zero
  • b) half
  • c) one
  • d) two
0 h : 0 m : 1 s