Which of the following statements is NOT true | vedclass

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(A) catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. It works by provid

Vedclass · Accepted Answer

It does not change the activation energy.

Vedclass · Answer

(A) catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. It works by providing an alternative reaction pathway or mechanism that has a lower activation energy $(E_a)$. Therefore,the statement that it does not change the activation energy is incorrect. Catalysts often form temporary intermediate complexes with reactants to facilitate the reaction,and enzyme catalysis is known for being highly specific.

Column-$I$ Catalyst	Column-$II$ Product
$(a)$ $V_2O_5$	$(i)$ Polyethylene
$(b)$ $TiCl_4/Al(Me)_3$	$(ii)$ Ethanal
$(c)$ $PdCl_2$	$(iii)$ $H_2SO_4$
$(d)$ Iron oxide	$(iv)$ $NH_3$

Which of the following statements is $NOT$ true for a catalyst?

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Match the catalyst (Column-$I$) with products (Column-$II$)

Column-$I$ Catalyst Column-$II$ Product

$(a)$ $V_2O_5$ $(i)$ Polyethylene

$(b)$ $TiCl_4/Al(Me)_3$ $(ii)$ Ethanal

$(c)$ $PdCl_2$ $(iii)$ $H_2SO_4$

$(d)$ Iron oxide $(iv)$ $NH_3$

Which of the following catalysts is used in the contact process for the industrial production of sulfuric acid from $SO_2$ and $O_2$ (air)?

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