NEW
New Website Launch
Experience the best way to solve previous year questions with mock tests (very detailed analysis), bookmark your favourite questions, practice etc...

## Chemical Kinetics

### Chemistry

#### Previous Years Questions

More
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) &nbsp;&nbsp;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 : &nbsp;&nbsp;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 $$&nbsp;&nbsp;2NO2(g) + 1/2O2(g) the value of rate of disappearance of N2O5 is given a... AIPMT 2010 Prelims The rate of the reaction, 2NO + Cl2$$ \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 $$products, it is observed that (i)&nbsp;&nbsp;on doubling the initial concentration of A... AIPMT 2009 In the reaction, BrO$$_{3(aq)}^ - $$+ 5Br$$_{(aq)}^ - $$+ 6H+$$ \to $$&nbsp;3Br2(l) + 3H2O(l). The rate of appearan... AIPMT 2009 For the reaction, N2 + 3H2$$ \to $$2NH3, if$${{d\left[ {N{H_3}} \right]} \over {dt}}$$= 2$$ \times $$10$$-$$4 mol ... AIPMT 2009 The bromination of acetone that occurs in acid solution is represented by this equation. CH3COCH3(aq) + Br2(aq)&nbsp;&n... AIPMT 2008 The rate constants k1 and k2 for two different reactions are 1016$$ \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 $$3C + D, which of the following does not express the reaction rate? AIPMT 2006 Consider the reaction :&nbsp;&nbsp;N2(g) + 3H2(g)$$ \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 $$5Br2 + H2O which of the following relation correctly represents... AIPMT 2000 How enzymes increases the rate of reactions AIPMT 2000 ## MCQ (More than One Correct Answer) More Activation energy (E$$a) and rate constants (k1 and k2) of a chemical reaction at two different temperatures (T1 and T...
AIPMT 2012 Mains

### Joint Entrance Examination

JEE Main JEE Advanced WB JEE

### Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

NEET

Class 12