MCQ
Which is correct for catalyst?
  • A
    A catalyst can initiate a reaction
  • B
    A negative catalyst can decrease the activation energy
  • A catalyst can't change the enthalpy of reaction
  • D
    A catalyst can increases the rate of forward reaction and decreases that of the backward reaction [For a reversible reaction]

Answer

Correct option: C.
A catalyst can't change the enthalpy of reaction
c

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

In the following the most stable conformation of $n-$ butane is
The $\mathrm{K}_{\mathrm{sp}}$ for the following dissociation is $1.6 \times 10^{-5}$

$\mathrm{PbCl}_{2(\mathrm{s})} \rightleftharpoons \mathrm{Pb}_{(\mathrm{ag})}^{2+}+2 \mathrm{Cl}_{(\mathrm{aq})}^{-}$

Which of the following choices is correct for a mixture of $300\; \mathrm{mL}\;\; 0.134 \;\mathrm{M} \;\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}$ and $100\; \mathrm{mL}\;\; 0.4\; \mathrm{M}\; \mathrm{NaCl} ?$

Tautomerism is exhibited by
The bonds in ${K_4}\,[Fe\,{(CN)_6}]$ are
One mole of an ideal diatomic gas $(C_V = 5\, cal)$ was transformed from initial $25\,^oC$ and $1\,L$ to the state when temperature is $100\,^oC$ and volume $10\,L.$ The entropy change of the process can be expressed as $(R = 2$ calories $/mol / k)$ :-
Among the oxides of nitrogen, $N_2 O,NO$ nnd $NO_2$ ,molecules with unpaired electrons are
Assertion :Fluorine molecule has bond order one.
Reason : The number of electrons in the antibonding molecular orbitals is two less than that in bonding molecular orbitals.
Given below are two statements:

Statement $I$ : Nickel is being used as the catalyst for producing syn gas and edible fats.

Statement $II$ : Silicon forms both electron rich and electron deficient hydrides.

In the light of the above statements, choose the most appropriate answer from the options given below:

How many geometrical isomers are possible for the above compound ?
Match List $I$ with List $II$.

List $I$ Isomeric pairs List $II$ Type of isomers
$A$ Propanamine and $N-$Methylethanamine $I$ Metamers
$B$ Hexan$-2-$one and Hexan$-3-$one $II$ Positional isomers
$C$ Ethanamide and Hydroxyethanimine $III$ Functional isomers
$D$ $o-$nitrophenol and $p-$nitrophenol $IV$ Tautomers

Choose the correct answer from the options given below :-