6
MCQ (Single Correct Answer)
According to Arrhenius equation rate constant k is equal to $\mathrm{A} \mathrm{e}^{-\mathrm{E}_{\mathrm{a}} / R T}$ Which of the following options represents the graph of $\ln k$ vs $\frac{1}{\mathrm{~T}}$ ?
A
B
C
D
7
MCQ (Single Correct Answer)
Consider the Arrhenius equation given below and mark the correct option.
$$k=A e^{-\frac{E_a}{R T}}$$
A
Rate constant increases exponentially with increasing activation energy and decreasing temperature
B
Rate constant decreases exponentially with increasing activation energy and decreasing temperature
C
Rate constant increases exponentially with decreasing activation energy and decreasing temperature
D
Rate constant increases exponentially with decreasing activation energy and increasing temperature
8
MCQ (Single Correct Answer)
A graph of volume of hydrogen released vs time for the reaction between zinc and dil. HCl is given in figure. On the basis of this mark the correct option.
A
Average rate upto 40 s is $\frac{V_3-V_2}{40}$
B
Average rate upto 40 s is $\frac{V_3-V_2}{40-30}$
C
Average rate upto 40 s is $\frac{V_3}{40}$
D
Average rate upto 40 s is $\frac{V_3-V_1}{40-20}$
9
MCQ (Single Correct Answer)
Which of the following statements is not correct about order of a reaction?
A
The order of a reaction can be a fractional number
B
Order of a reaction is experimentally determined quantity
C
The order of a reaction is always equal to the sum of the stoichiometric coefficients of reactants in the balanced chemical equation for a reaction
D
The order of a reaction is the sum of the powers of molar concentration of the reactants in the rate law expression
10
MCQ (Single Correct Answer)
Consider the graph given in figure. Which of the following options does not show instantaneous rate of reaction at 40s?
A
$\frac{V_5-V_2}{50-30}$
B
$\frac{V_4-V_2}{50-30}$
C
$\frac{V_3-V_2}{40-30}$
D
$\frac{V_3-V_1}{40-20}$