Catalyst and Catalysis
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CHXII05:SURFACE CHEMISTRY

320693 Regarding criteria of catalysis which one of the following statements is not true ?

1 A catalyst is unchanged chemically during the reaction.
2 A small quantity of catalyst is often sufficient to bring about a considerable amount of the reaction.
3 In reversible reaction, the catalyst alters the equilibrium position.
4 The catalyst accelerates the rate of reaction.
CHXII05:SURFACE CHEMISTRY

320694 When \(\mathrm{KClO}_{3}\) is heated, it decomposes into \(\mathrm{KCl}\) and \(\mathrm{O}_{2}\). If some \(\mathrm{MnO}_{2}\) is added, the reaction goes much faster because

1 \(\mathrm{MnO}_{2}\) decomposes to give \(\mathrm{O}_{2}\).
2 \(\mathrm{MnO}_{2}\) provides heat by \(\mathrm{MnO}_{2}\).
3 better contact is provided by \(\mathrm{MnO}_{2}\).
4 \(\mathrm{MnO}_{2}\) acts as a catalyst.
CHXII05:SURFACE CHEMISTRY

320695 ____ acts as a negative catalyst in the decomposition of \(\mathrm{H}_{2} \mathrm{O}_{2}\).

1 Platinum
2 Alcohol
3 Glycerol
4 \(\mathrm{MnO}_{2}\)
CHXII05:SURFACE CHEMISTRY

320696 Catalyst

1 May increase or may decrease activation energy
2 Brings out equilibrium
3 Lowers activation energy
4 Increases activation energy
CHXII05:SURFACE CHEMISTRY

320697 \(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{X}}{\longrightarrow} \mathrm{CH}_{4}+\mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Y}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{OH}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Z}}{\longrightarrow} \mathrm{HCHO}\)
\(\mathrm{X}, \mathrm{Y}\) and \(\mathrm{Z}\) respectively are

1 \(\mathrm{Cu}, \mathrm{ZnO} ; \mathrm{CrO}_{2}, \mathrm{Ni}\)
2 \(\mathrm{Cu} ; \mathrm{Ni} ; \mathrm{Cu}\)
3 \(\mathrm{Ni} ; \mathrm{Cu} ; \mathrm{ZnO}, \mathrm{CrO}_{2}\)
4 \(\mathrm{Ni} ; \mathrm{ZnO}, \mathrm{CrO}_{2} ; \mathrm{Cu}\)
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CHXII05:SURFACE CHEMISTRY

320693 Regarding criteria of catalysis which one of the following statements is not true ?

1 A catalyst is unchanged chemically during the reaction.
2 A small quantity of catalyst is often sufficient to bring about a considerable amount of the reaction.
3 In reversible reaction, the catalyst alters the equilibrium position.
4 The catalyst accelerates the rate of reaction.
CHXII05:SURFACE CHEMISTRY

320694 When \(\mathrm{KClO}_{3}\) is heated, it decomposes into \(\mathrm{KCl}\) and \(\mathrm{O}_{2}\). If some \(\mathrm{MnO}_{2}\) is added, the reaction goes much faster because

1 \(\mathrm{MnO}_{2}\) decomposes to give \(\mathrm{O}_{2}\).
2 \(\mathrm{MnO}_{2}\) provides heat by \(\mathrm{MnO}_{2}\).
3 better contact is provided by \(\mathrm{MnO}_{2}\).
4 \(\mathrm{MnO}_{2}\) acts as a catalyst.
CHXII05:SURFACE CHEMISTRY

320695 ____ acts as a negative catalyst in the decomposition of \(\mathrm{H}_{2} \mathrm{O}_{2}\).

1 Platinum
2 Alcohol
3 Glycerol
4 \(\mathrm{MnO}_{2}\)
CHXII05:SURFACE CHEMISTRY

320696 Catalyst

1 May increase or may decrease activation energy
2 Brings out equilibrium
3 Lowers activation energy
4 Increases activation energy
CHXII05:SURFACE CHEMISTRY

320697 \(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{X}}{\longrightarrow} \mathrm{CH}_{4}+\mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Y}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{OH}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Z}}{\longrightarrow} \mathrm{HCHO}\)
\(\mathrm{X}, \mathrm{Y}\) and \(\mathrm{Z}\) respectively are

1 \(\mathrm{Cu}, \mathrm{ZnO} ; \mathrm{CrO}_{2}, \mathrm{Ni}\)
2 \(\mathrm{Cu} ; \mathrm{Ni} ; \mathrm{Cu}\)
3 \(\mathrm{Ni} ; \mathrm{Cu} ; \mathrm{ZnO}, \mathrm{CrO}_{2}\)
4 \(\mathrm{Ni} ; \mathrm{ZnO}, \mathrm{CrO}_{2} ; \mathrm{Cu}\)
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CHXII05:SURFACE CHEMISTRY

320693 Regarding criteria of catalysis which one of the following statements is not true ?

1 A catalyst is unchanged chemically during the reaction.
2 A small quantity of catalyst is often sufficient to bring about a considerable amount of the reaction.
3 In reversible reaction, the catalyst alters the equilibrium position.
4 The catalyst accelerates the rate of reaction.
CHXII05:SURFACE CHEMISTRY

320694 When \(\mathrm{KClO}_{3}\) is heated, it decomposes into \(\mathrm{KCl}\) and \(\mathrm{O}_{2}\). If some \(\mathrm{MnO}_{2}\) is added, the reaction goes much faster because

1 \(\mathrm{MnO}_{2}\) decomposes to give \(\mathrm{O}_{2}\).
2 \(\mathrm{MnO}_{2}\) provides heat by \(\mathrm{MnO}_{2}\).
3 better contact is provided by \(\mathrm{MnO}_{2}\).
4 \(\mathrm{MnO}_{2}\) acts as a catalyst.
CHXII05:SURFACE CHEMISTRY

320695 ____ acts as a negative catalyst in the decomposition of \(\mathrm{H}_{2} \mathrm{O}_{2}\).

1 Platinum
2 Alcohol
3 Glycerol
4 \(\mathrm{MnO}_{2}\)
CHXII05:SURFACE CHEMISTRY

320696 Catalyst

1 May increase or may decrease activation energy
2 Brings out equilibrium
3 Lowers activation energy
4 Increases activation energy
CHXII05:SURFACE CHEMISTRY

320697 \(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{X}}{\longrightarrow} \mathrm{CH}_{4}+\mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Y}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{OH}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Z}}{\longrightarrow} \mathrm{HCHO}\)
\(\mathrm{X}, \mathrm{Y}\) and \(\mathrm{Z}\) respectively are

1 \(\mathrm{Cu}, \mathrm{ZnO} ; \mathrm{CrO}_{2}, \mathrm{Ni}\)
2 \(\mathrm{Cu} ; \mathrm{Ni} ; \mathrm{Cu}\)
3 \(\mathrm{Ni} ; \mathrm{Cu} ; \mathrm{ZnO}, \mathrm{CrO}_{2}\)
4 \(\mathrm{Ni} ; \mathrm{ZnO}, \mathrm{CrO}_{2} ; \mathrm{Cu}\)
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CHXII05:SURFACE CHEMISTRY

320693 Regarding criteria of catalysis which one of the following statements is not true ?

1 A catalyst is unchanged chemically during the reaction.
2 A small quantity of catalyst is often sufficient to bring about a considerable amount of the reaction.
3 In reversible reaction, the catalyst alters the equilibrium position.
4 The catalyst accelerates the rate of reaction.
CHXII05:SURFACE CHEMISTRY

320694 When \(\mathrm{KClO}_{3}\) is heated, it decomposes into \(\mathrm{KCl}\) and \(\mathrm{O}_{2}\). If some \(\mathrm{MnO}_{2}\) is added, the reaction goes much faster because

1 \(\mathrm{MnO}_{2}\) decomposes to give \(\mathrm{O}_{2}\).
2 \(\mathrm{MnO}_{2}\) provides heat by \(\mathrm{MnO}_{2}\).
3 better contact is provided by \(\mathrm{MnO}_{2}\).
4 \(\mathrm{MnO}_{2}\) acts as a catalyst.
CHXII05:SURFACE CHEMISTRY

320695 ____ acts as a negative catalyst in the decomposition of \(\mathrm{H}_{2} \mathrm{O}_{2}\).

1 Platinum
2 Alcohol
3 Glycerol
4 \(\mathrm{MnO}_{2}\)
CHXII05:SURFACE CHEMISTRY

320696 Catalyst

1 May increase or may decrease activation energy
2 Brings out equilibrium
3 Lowers activation energy
4 Increases activation energy
CHXII05:SURFACE CHEMISTRY

320697 \(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{X}}{\longrightarrow} \mathrm{CH}_{4}+\mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Y}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{OH}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Z}}{\longrightarrow} \mathrm{HCHO}\)
\(\mathrm{X}, \mathrm{Y}\) and \(\mathrm{Z}\) respectively are

1 \(\mathrm{Cu}, \mathrm{ZnO} ; \mathrm{CrO}_{2}, \mathrm{Ni}\)
2 \(\mathrm{Cu} ; \mathrm{Ni} ; \mathrm{Cu}\)
3 \(\mathrm{Ni} ; \mathrm{Cu} ; \mathrm{ZnO}, \mathrm{CrO}_{2}\)
4 \(\mathrm{Ni} ; \mathrm{ZnO}, \mathrm{CrO}_{2} ; \mathrm{Cu}\)
Join With Us for More Updates
CHXII05:SURFACE CHEMISTRY

320693 Regarding criteria of catalysis which one of the following statements is not true ?

1 A catalyst is unchanged chemically during the reaction.
2 A small quantity of catalyst is often sufficient to bring about a considerable amount of the reaction.
3 In reversible reaction, the catalyst alters the equilibrium position.
4 The catalyst accelerates the rate of reaction.
CHXII05:SURFACE CHEMISTRY

320694 When \(\mathrm{KClO}_{3}\) is heated, it decomposes into \(\mathrm{KCl}\) and \(\mathrm{O}_{2}\). If some \(\mathrm{MnO}_{2}\) is added, the reaction goes much faster because

1 \(\mathrm{MnO}_{2}\) decomposes to give \(\mathrm{O}_{2}\).
2 \(\mathrm{MnO}_{2}\) provides heat by \(\mathrm{MnO}_{2}\).
3 better contact is provided by \(\mathrm{MnO}_{2}\).
4 \(\mathrm{MnO}_{2}\) acts as a catalyst.
CHXII05:SURFACE CHEMISTRY

320695 ____ acts as a negative catalyst in the decomposition of \(\mathrm{H}_{2} \mathrm{O}_{2}\).

1 Platinum
2 Alcohol
3 Glycerol
4 \(\mathrm{MnO}_{2}\)
CHXII05:SURFACE CHEMISTRY

320696 Catalyst

1 May increase or may decrease activation energy
2 Brings out equilibrium
3 Lowers activation energy
4 Increases activation energy
CHXII05:SURFACE CHEMISTRY

320697 \(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{X}}{\longrightarrow} \mathrm{CH}_{4}+\mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Y}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{OH}\)
\(\mathrm{CO}+\mathrm{H}_{2} \stackrel{\mathrm{Z}}{\longrightarrow} \mathrm{HCHO}\)
\(\mathrm{X}, \mathrm{Y}\) and \(\mathrm{Z}\) respectively are

1 \(\mathrm{Cu}, \mathrm{ZnO} ; \mathrm{CrO}_{2}, \mathrm{Ni}\)
2 \(\mathrm{Cu} ; \mathrm{Ni} ; \mathrm{Cu}\)
3 \(\mathrm{Ni} ; \mathrm{Cu} ; \mathrm{ZnO}, \mathrm{CrO}_{2}\)
4 \(\mathrm{Ni} ; \mathrm{ZnO}, \mathrm{CrO}_{2} ; \mathrm{Cu}\)