MCQ
Which of the following statement is not correct for the catalyst?
  • A
    It catalyses the forward and backward reaction to the same extent.
  • It alters $\Delta\text{G}$ of the reaction.
  • C
    It is a substance that does not change the equilibrium constant of a reaction.
  • D
    It provides an alternate mechanism by reducing activation energy between reactants and products.

Answer

Correct option: B.
It alters $\Delta\text{G}$ of the reaction.
A catalyst does not alter Gibbs energy$, (G)$ of a reaction. It catalyses the spontaneous reactions but does not catalyse non$-$spontaneous reactions.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Which chlorine atom is more electronegative in the following
Acetamide reacts with ${P_2}{O_5}$ (phosphorus pentaoxide) to give
A solution of urea (mol. mass $56\,g $ $mol^{-1}$) boils at $100.18\,^oC$  at the atmospheric pressure. If ${K_f}$ and ${K_b}$for water are  $1.86$  and $0.512\, K\,kg $ $mol^{-1}$ respectively the above solution will freeze at  ......... $^oC$.
Which of the following silver compounds finds maximum use in photography
Which of the following statement is wrong ?
Copper reduces $NO _{3}^{-}$ into $NO$ and $NO _{2}$ depending uponthe concentration of $HNO _{3}$ insolution. (Assuming fixed $\left[ Cu ^{2+}\right]$ and $\left. P _{ NO }= P _{ NO _{2}}\right),$ the $HNO _{3}$ concentration at which the thermodynamic tendency for reduction of $NO _{3}^{-}$ into $NO$ and $NO _{2}$ by copper is same is $10^{ x }\, M$. The value of $2 x$ is ...... .

$\left[\right.$ Given $, E_{C u^{2+} / C u}^{o}=0.34\, V , E _{ NO _{3}^{-} / NO_2 }^{\circ}=0.96\, V$ (Rounded-off to the nearest integer) $E _{ NO _{3} / NO _{2}}^{\circ}=0.79 \,V$ and at $298 \,K$  $\left.\frac{ RT }{ F }(2.303)=0.059\right]$

Product $(C)$ of the above reaction is
Phosphonic acid is
Among the following the order of reactivity towards nucleophilic addition is
For the reaction between $A$ and $B$ , the initial rate of reaction $(r_0)$ was measured for different initial concentration of $A$ and $B$ as given below Order of the reaction with respect to $A$ and $B$ respectively, is $\sqrt 2  = 1.4 ,\,\sqrt 3  \times 10^{-4}$ 
$A/mol\,L^{-1}$ $0.2$ $0.2$ $0.4$
$B/mol\,L^{-1}$ $0.3$ $0.1$ $0.05$
$r_0/mol^{-1}s^{-1}$ $5.0\times 10^{-5}$ $5.0\times 10^{-5}$ $1.4\times 10^{-4}$