Prepare for NEET Chemistry Chemical Kinetics with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert explanations to master reaction rates and mechanisms.
For a zero-order reaction, the plot of concentration of reactant versus time is:
a straight line with a positive slope
a straight line with a negative slope
an exponential decay curve
a hyperbolic curve
The pre-exponential factor (A) in the Arrhenius equation is related to the:
Activation energy of the reaction
Enthalpy change of the reaction
Frequency of collisions with proper orientation
Temperature of the reaction
The inversion of sucrose is a pseudo-first-order reaction. Which of the following best explains this classification?
The reaction is first order with respect to sucrose and zero order with respect to water.
The reaction is first order with respect to both sucrose and water, but the concentration of water is much larger than sucrose.
Water acts as a catalyst in the reaction.
Water is present in large excess, so its concentration remains effectively constant.
The rate of a reaction is given by Rate = k[A][B]. What is the overall order of the reaction?
1
2
3
4
Which of these indicates a faster reaction rate?
A small negative change in reactant concentration over a long time
A large negative change in reactant concentration over a short time
No change in reactant concentration over time
A small positive change in reactant concentration over a long time
Increasing the surface area of a solid reactant generally...
Decreases the reaction rate
Increases the reaction rate
Has no effect on the reaction rate
Changes the order of the reaction
A catalyst increases the rate of a reaction by:
Increasing the activation energy
Lowering the activation energy
Increasing the concentration of reactants
Increasing the temperature
Which of the following factors does NOT affect the rate of a homogeneous reaction?
Temperature
Concentration of reactants
Presence of a catalyst
The volume of the container (at constant concentration)
Which statement BEST describes the relationship between the rate constant (k) and temperature (T)?
k is directly proportional to T
k is inversely proportional to T
k increases exponentially with increasing T
k decreases exponentially with increasing T
