If the molecules in the reactants collide with enough kinetic energy and this energy is _________the transition state energy, then the reaction occurs and products formed.

• A) higher than
• B) lower than
• C) equal to
• D) none of these

Concept of activation energy is given by_________?

• A) none of these
• B) Michel Faraday
• C) Svante Arrhenius
• D) Boltzmann

The concentration of reactants approaches zero more slowly in a second-order, compared to that in a ________reaction.

• A) first order
• B) zero order
• C) second order
• D) pseudo order

The differential rate law can show us how the_______ of the reaction changes in time, while the integrated rate equation shows how the __________ of species changes over time.

• A) Order, Concentration
• B) Surface, Order
• C) Rate, Order
• D) Rate, Concentration

Formation of double stranded DNA from two complementary strands is

• A) Third order reaction
• B) Order less reaction
• C) Second order reaction
• D) First order reaction

The double bond of ethene consists of two clouds of negative charge corresponding to the σ (sigma) and π (pi)_______________.

• A) atomic orbital
• B) bonding orbitals
• C) molecular orbitals
• D) anti-bonding orbitals

In a pseudo-first-order reaction, if the concentration of the excess reactant is reduced to a minimum value, how does this affect the overall reaction rate?

• A) The reaction rate decreases exponentially
• B) The reaction rate becomes zero
• C) The reaction rate remains constant
• D) The reaction rate decreases linearly

_________indicates the rate of collision and the fraction of collisions with the proper orientation for the reaction to occur.

• A) Boltzmann constant
• B) Arrhenius factor
• C) none of these
• D) Rate constant

ΔGo is the change in Gibbs energy when the reaction happens at ______________.

• A) Transition state
• B) Critical State
• C) 290K
• D) Standard State

If a catalyst is added to the reaction, the activation energy is lowered because

• A) A lower energy transition state is formed
• B) A higher energy transition state is formed
• C) A lower energy transition state is not formed
• D) A normal energy transition state is not formed

Activation energy for a ___________is zero.

• A) low concentration
• B) radical reaction
• C) fast reaction
• D) chain reaction

The activation energy is the ______________that the reactant(s) must acquire before reaching the transition state.

• A) threshold energy
• B) maximum energy
• C) constant energy
• D) critical energy

HCl is ________molecule.

• A) non-polar
• B) partially polar
• C) none of these
• D) highly polar

A reaction with a ________activation energy requires much more energy to reach the transition state.

• A) constant
• B) Large
• C) small
• D) negligible

Thermal energy relates direction to motion at the __________level.

• A) atomic
• B) none of these
• C) sub atomic
• D) Molecular

Which factor primarily influences the rate of a pseudo-first-order reaction?

• A) Catalyst concentration
• B) Concentration of the limiting reactant
• C) Nature of reactants
• D) Temperature

R is the real gas constant with value ________?

• A) 6.430 J/mol K.
• B) 9.614 J/mol K.
• C) 8.581 J/mol K.
• D) 8.314 J/mol K

For a zero-order reaction, how is the rate of the reaction affected when the concentration of the reactant is increased?

• A) Rate increases
• B) Rate remains constant
• C) Rate becomes zero
• D) Rate decreases

If the reaction proceeds faster by adding catalyst, the rate constant (k) _________?

• A) decreases
• B) remain unaffected
• C) Increases
• D) approaches zero

Half life of a first order reaction is ________of its initial concentration.

• A) directly proportional
• B) independent
• C) dependent
• D) inversely proportional