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Chemical Kineti...

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  • Question 1
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    A reaction  PQP \rightarrow Q  is  25%25\%  complete in  25min,25 min,   50%50\%  complete in  25min25 min  if  [P][ P ]  is halved. The reaction is  25%25 \%  completed in   50 min50 min  if  [P][ P ]  is doubled. The order of reaction is

  • Question 2
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    Reaction ABA\rightarrow B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of:

  • Question 3
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    Consider the following first order competing reaction :
    XK1A+BX\xrightarrow{{{K_1}}}A + B and YK2C+DY\xrightarrow{{{K_2}}}C + D 
    if 50%50\% of the reaction of XX was completed when 96%96\% of the reaction of YY was completed , the ratio of their rate constant (K2/K1)\left( {{K_2}/{K_1}} \right) is:

  • Question 4
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    For a first-order reaction, the plot of 't' against log Clog \ C gives a straight line with a slope equal to:

  • Question 5
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    The initial concentration of N2O5N_2O_5 in the following first order reaction  N2O5(g)2NO2(g)+12O2(g)N_2O_{5(g)} \rightarrow 2NO_2(g) + \dfrac{1}{2} O_2 (g) was 1.24×102 molL11.24 \times 10^{-2} \ molL^{-1} at 318 K. The concentration of N2O5N_2O_5 after 60 min was 0.20×102 molL10.20 \times 10^{-2} \ molL^{-1}. Calculate the rate constant of the reaction at 318 K.

  • Question 6
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    The curves MM and NN represent the variation of energy with reaction coordinates for the reaction A(g)+B(g)  C(g)+D(g)A(g)+B(g) \rightleftharpoons  C(g)+D(g) in absence and presence of negative catalyst
    Of the curves MM and NN, which represents the EaE_{a} for the backward reaction in the presence of catalyst 

  • Question 7
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    For a zero order reaction:

  • Question 8
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    A graph of log10klog_{10}k is plotted against 1/T1/T for a reaction with order 2.5. If the activation energy is 10 kJ/mol, then magnitude of the slope will be: 

  • Question 9
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    In a first order reaction, 0.160.16 moles of reactant decrease to 0.020.02 moles in 144144 minutes, its half life is ?

  • Question 10
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    The time required for 75% completion of a first reaction is 9 hr. The half-life period of the reaction is:

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