| 1 |
which one of the following is a heteroheneous catalysis
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| 2 |
Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is
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A. Na and K
B. Na and Hg
C.Hg and Zn
D. Cu and Te
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| 3 |
The rate determining step is the :
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A. Slowest step.
B. Fastest step.
C.Moderate step.
D. Both (a) and (b).
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| 4 |
The unit of rate constant k is the same as that of the rate of reaction in
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A. First order reaction
B. Second order reaction
C.Third order reaction
D. Zero order reaction
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| 5 |
If the rate of reaction is independent of the concentration of the reactant, the reaction is of
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A. Zero order
B. First order
C.Second order
D. Third order
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| 6 |
Which statement about Arrhenius equation is incorrect
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A. Factor 'A' called Arrhenius constant depends upon collision frequency of reactants
B. Rate of reaction increase by increasing temperature
C.Rate constant k is increased
D. Activation energy Ea is decreased by rise in temperature
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| 7 |
In an experiment the concentration of a reactant 'A' is doubled the rate increases four times. If concentration in tripled, then rate increases nint times. Thus the rate is proportional to ______ of concentration of 'A'
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A. Square root
B. Square
C.Twice
D. Cube
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| 8 |
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A. First order
B. Pseudo first order
C.Second order
D. Zero order
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| 9 |
In exothermic reaction decrease in potential energy of the products will result in
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A. Decreases in kinetic energy of the particles
B. Increases in kinetic energy of the particles
C.No change in kinetic energy
D. Decreases in activation energy
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| 10 |
The reaction rate is expressed in the units of
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A. mol dm-3S-
B. mol dm-3
C.mol dm-3N-
D. dm-3S-
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| 11 |
Dilatometric method is used for rate determination when
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A. Reactions involving change of optical
B. Reactions involving change of optical activity
C.Reactions involving small volume change
D. None of above
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| 12 |
Which of the following factors does not influenced the rate of reaction
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A. Concentration of the reaction
B. Nature of the reactants
C.Molecularity of the reaction
D. Temperature
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| 13 |
To determine the rate of reaction chemically a graphical method is applied. A graph is plotted between the amount or reactant decomposed or product formed against the time. The rate dx/dtat any time is equal to
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A. k
B. Tangentθ
C.1/a, a is initial conc.
D. 1/a2
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| 14 |
In the manufacture of NH3by Haber's process catalyst used is iron its catalytic efficiency is poisoned by
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A. Presence of Al2O3
B. Presence of Cr2O3
C.MnO2
D. CO present with H2gas
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| 15 |
Which of the following is not affected by light
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| 16 |
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A. Rate is independent of concentration of water since it is in excess
B. Rate is independent of concentration of ester since it is in exces
C.Rate depends upon the concentration of acid catalyst added
D. Rate = k[CH3COOC2H5]1/2[H2O]1/2
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| 17 |
Which statement is not correct
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A. Enzymes catalyst a specific reaction
B. Enzymes show catalytic activity at a specific temperature
C.The catalytic activity of enzymes is stopped if optimum pH is changed
D. The catalytic activity is poisoned by a co-enzymes
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| 18 |
Which one of the following reaction rate is effected by the light
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| 19 |
If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is :
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A. 1
B. 2
C.3
D. Above
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| 20 |
The rate of reaction :
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A. Increase as the reaction proceeds.
B. Decreases as the reaction proceeds.
C.Remains the same as the reaction proceed.
D. May decrease or increase as the reaction proceeds.
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| 21 |
In thermal decomposition of N2O the half life period for two different initial concentrations of N2O are (i) 255 second for initial N2O 290 mm Hg (ii) 212 second for initial N2O 360 mm Hg then it is
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A. Zero order
B. First order
C.Second order
D. Third order
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| 22 |
If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is
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A. Spectrometry
B. Refractometry
C.Conductivity measurement
D. Optical method
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| 23 |
The rate of reaction determined at a given time is called
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A. Average rate
B. Instantaneous rate
C.Specific rate
D. Overall rate
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| 24 |
In the hydrolysis of CH3COOC2H5the acid produced is
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A. Inhibitor
B. Catalyst
C.Auto catalyst
D. None of above
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| 25 |
For a chemical reaction to take place the particles must have sufficient energy for the effective collisions, the energy is called
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A. Average energy
B. Activation energy
C.Potential energy
D. Collision energy
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| 26 |
The change in concentration of reactant or product per unit time is called :
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A. Rate constant.
B. Rate of reaction.
C.Rate equation.
D. Rate law.
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| 27 |
Decreases om concentration of reactant is denoted by
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A. dc/dt
B. -dc/dt
C.+dc/dt
D. None
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| 28 |
The unit of rate constant is the same as that of the rate of reaction in :
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A. First order reaction.
B. Second order reaction.
C.Zero order reaction.
D. Third order reaction.
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| 29 |
All reactions occur in :
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A. A single step.
B. A series of steps
C.Two steps.
D. Both (a) and (b)
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| 30 |
In the expression rate = K [A]a[B]bK is
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A. The order of reaction
B. The speed of reaction
C.The specific rate constant
D. The overall order of reaction
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