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NEET

Chemical Kinetics

Chemistry

Previous Years Questions

MCQ (Single Correct Answer)

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The given graph is a representation of kinetics of a reaction The y and x axes for zero and first order reactions, resp...
NEET 2022
The slope of Arrhenius plot $$\left( {\ln \,k\,v/s{1 \over T}} \right)$$ of first order reactino is $$-$$5 $$\times$$ 10...
NEET 2021
For a reaction, A $$\to$$ B, enthalpy of reaction is $$-$$4.2 kJ mol$$-$$1 and enthalpy of activation is 9.6 kJ mol$$-$$...
NEET 2021
The rate constant for a first order reaction is 4.606 $$ \times $$ 10-3 s-1. The time required to reduce 2.0 g of the re...
NEET 2020 Phase 1
An increase in the concentration of the reactants of a reaction leads to change in :
NEET 2020 Phase 1
For the chemical reaction N2(g) + 3H2(g) ⇌ 2NH3(g) the correct option is :
NEET 2019
If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction i...
NEET 2019
When initial concentration of the reactant is doubled, the half-life period of a zero order reaction
NEET 2018
The correct difference between first and second order reactions is that
NEET 2018
A first order reaction has a specific reaction rate of 10$$-$$2 sec$$-$$1. How much time will it take for 20 g of the re...
NEET 2017
Mechanism of a hypothetical reaction X2 + Y2 $$ \to $$ 2XY, is given below : (i)   X2 $$ \to $$ X + X (fast...
NEET 2017
The addition of a catalyst during a chemical reaction alters which of the following quantities?
NEET 2016 Phase 1
The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the
NEET 2016 Phase 2
The rate of first-order reaction is 0.04 mol L$$-$$1 s$$-$$1 at 10 seconds and 0.03 mol L$$-$$1 s$$-$$1 at 20 seconds af...
NEET 2016 Phase 1
The activation energy of a reaction can be determined from the slope of which of the following graphs?
AIPMT 2015 Cancelled Paper
When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of th...
AIPMT 2015 Cancelled Paper
The rate constant of the reaction A $$ \to $$ B is 0.6 $$ \times $$ 10$$-$$3 mol L$$-$$1 s$$-$$1. If the concentration ...
AIPMT 2015
A reaction is 50% complete in 2 hours and 75% complete in 4 hours. The order of reaction is
NEET 2013 (Karnataka)
For a reaction between A and B the order with respect to A is 2 and the other with respect to B is 3. The concentrations...
NEET 2013 (Karnataka)
What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20oC to 35oC? (R =...
NEET 2013
In a zero-order reaction, for every 10oC rise of temperature, the rate is doubled. If the temperature is increased from ...
AIPMT 2012 Prelims
In a reaction, A + B $$ \to $$ product, rate is doubled when the concentration of B is doubled, and rate increases by a ...
AIPMT 2012 Prelims
The half-life of a substance in a certain enzyme-catalysed reaction is 138 s. The time required for the concentration of...
AIPMT 2011 Mains
The unit of rate constant for a zero order reaction is
AIPMT 2011 Mains
The rate of the reaction :   2N2O5 $$ \to $$ 4NO2 + O2 can be written in three ways. $${{ - d\left[ {{N_2}{O_...
AIPMT 2011 Mains
Which one of the following statements for the order of a reaction is incorrect?
AIPMT 2011 Prelims
During the kinetic study of the reaction, 2A + B $$ \to $$ C + D, following results were obtained .tg {border-collapse...
AIPMT 2010 Prelims
For the reaction N2O5(g) $$ \to $$  2NO2(g) + 1/2O2(g) the value of rate of disappearance of N2O5 is given a...
AIPMT 2010 Prelims
The rate of the reaction, 2NO + Cl2 $$ \to $$ 2NOCl is given by the rate equation rate = k[NO]2[Cl2]. The value of the r...
AIPMT 2010 Mains
Half-life period of a first order reaction is 1386 seconds. The specific rate constant of the reaction is
AIPMT 2009
For the reaction A + B $$ \to $$ products, it is observed that (i)  on doubling the initial concentration of A...
AIPMT 2009
In the reaction, BrO$$_{3(aq)}^ - $$ + 5Br$$_{(aq)}^ - $$ + 6H+ $$ \to $$ 3Br2(l) + 3H2O(l). The rate of appearan...
AIPMT 2009
For the reaction, N2 + 3H2 $$ \to $$ 2NH3, if $${{d\left[ {N{H_3}} \right]} \over {dt}}$$ = 2 $$ \times $$ 10$$-$$4 mol ...
AIPMT 2009
The bromination of acetone that occurs in acid solution is represented by this equation. CH3COCH3(aq) + Br2(aq) &n...
AIPMT 2008
The rate constants k1 and k2 for two different reactions are 1016 $$ \cdot $$ e$$-$$2000/T and 1015 $$ \cdot $$ e$$-$$...
AIPMT 2008
The reaction of hydrogen and iodine monochloride is given as : H2(g) + 2ICl(g) $$ \to $$ 2HCl(g) + I2(g) This reaction ...
AIPMT 2007
In a first-order reaction A $$ \to $$ B, if k is rate constant and initial concentration of the reactant A is 0.5 M, the...
AIPMT 2007
If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximate...
AIPMT 2007
For the reaction, 2A + B $$ \to $$ 3C + D, which of the following does not express the reaction rate?
AIPMT 2006
Consider the reaction :  N2(g) + 3H2(g) $$ \to $$ 2NH3(g) The equality relationship between $${{d\left[ {N{H_3...
AIPMT 2006
For a first order reaction A $$ \to $$ B the reaction rate a reactant concentration of 0.01 M is found to be 2.0 $$ \tim...
AIPMT 2005
The rate of reaction between two reactions A and B decreases by a factor of 4 if the concentration of reactant B is doub...
AIPMT 2005
The rate of a first order reaction is 1.5 $$ \times $$ 10$$-$$2 mol L$$-$$1 min$$-$$1 at 0.5 M concentration of the reac...
AIPMT 2004
The activation energy for a simple chemical reaction A $$\rightleftharpoons$$ B is E$$a$$ in forward direction. The acti...
AIPMT 2003
The reaction A $$ \to $$ B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 ...
AIPMT 2003
If the rate of the reaction is equal to the rate constant, the order of the reaction is
AIPMT 2003
The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, $$k = ...
AIPMT 2003
2A $$ \to $$ B + C It would be a zero order reaction when
AIPMT 2002
For the reaction; 2N2O5 $$ \to $$ 4NO2 + O2 rate and rate constant are 1.02 $$ \times $$ 10$$-$$4 and 3.4 $$ \times ...
AIPMT 2001
When a bio-chemical reaction is carried out in laboratory, outside the human body in absence of enzyme, then rate of rea...
AIPMT 2001
For the reaction H+ + BrO$$_3^ - $$ + 3Br$$-$$ $$ \to $$ 5Br2 + H2O which of the following relation correctly represents...
AIPMT 2000
How enzymes increases the rate of reactions
AIPMT 2000

MCQ (More than One Correct Answer)

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Activation energy (E$$a$$) and rate constants (k1 and k2) of a chemical reaction at two different temperatures (T1 and T...
AIPMT 2012 Mains

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