20
MCQ (Single Correct Answer)
Consider the reaction $\mathrm{A} \longrightarrow \mathrm{B}$. The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?
A
B
C
D
21
MCQ (Multiple Correct Answer)
Rate law cannot be determined from balanced chemical equation if ............... .
A
reverse reaction is involved
B
it is an elementary reaction
C
it is a sequence of elementary reactions
D
any of the reactants is in excess
22
MCQ (Multiple Correct Answer)
Which of the following statements are applicable to a balanced chemical equation of an elementary reaction?
A
Order is same as molecularity
B
Order is less than the molecularity
C
Order is greater than the molecularity
D
Molecularity can never be zero
23
MCQ (Multiple Correct Answer)
In any unimolecular reaction .............. .
A
only one reacting species is involved in the rate determining step
B
the order and the molecularity of slowest step are equal to one
C
the molecularity of the reaction is one and order is zero
D
both molecularity and order of the reaction are one
24
MCQ (Multiple Correct Answer)
For a complex reaction ......... .
A
order of overall reaction is same as molecularity of the slowest step
B
order of overall reaction is less than the molecularity of the slowest step
C
order of overall reaction is greater than molecularity of the slowest step
D
molecularity of the slowest step is never zero or non-integer