MCQ
A reaction is catalysed by $ ‘X ’$. Here $ ‘X ’$
- ADecreases the rate constant of reaction
- BDoes not affect the equilibrium constant of reaction
- CDecreases the enthalpy of reaction
- ✓Decreases the activation energy
✓
Answer
Correct option: D.
Decreases the activation energy
d
(d)Catalyst reduce the activation energy for reaction and thus increase the rate of reaction.
(d)Catalyst reduce the activation energy for reaction and thus increase the rate of reaction.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
The correct order of basic strength.
$2.5 \mathrm{~g}$ of a non-volatile, non-electrolyte is dissolved in $100 \mathrm{~g}$ of water at $25^{\circ} \mathrm{C}$. The solution showed a boiling point elevation by $2^{\circ} \mathrm{C}$. Assuming the solute concentration in negligible with respect to the solvent concentration, the vapour pressure of the resulting aqueous solution is . . . . . . $\mathrm{mm}$ of $\mathrm{Hg}$ (nearest integer)
→[Given : Molal boiling point elevation constant of water $\left(\mathrm{K}_{\mathrm{b}}\right)=0.52 \mathrm{K.} \mathrm{kg} \mathrm{mol}^{-1}$,
$1 \mathrm{~atm}$ pressure $=760 \mathrm{~mm}$ of $\mathrm{Hg}$, molar mass of water $\left.=18 \mathrm{~g} \mathrm{~mol}^{-1}\right\rfloor$
The two functional groups present in a typical carbohydrate are :
The standard electrode potential of the half cells are given below
→$Z{n^{2 + }} + 2{e^ - } \to Zn$ ; $E = - 7.62\,\,V,$
$F{e^{2 + }} + 2{e^ - } \to Fe$ ; $E = - 7.81\,\,V$
The emf of the cell $F{e^{2 + }} + Zn \to Z{n^{2 + }} + Fe$ is ............ $\mathrm{V}$
The reaction of $C_6H_5CH =CHCH_3$ with $HBr$ produces
→Select the incorrect match
For the given reaction 'D' will be :
The plot of $\log\,K$ Vs $\frac{1}{T}$ helps to calculate
→Combination of which parameter explain more oxidising strength of $F_2$ as compared to $Cl_2$ in water:
→