321384
Transition metals can act as catalysts because these can change their oxidation state. How does \(\mathrm{\mathrm{Fe}(\mathrm{III})}\) catalyse the reaction between iodide and persulphate ions?
1 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{+}}\)
3 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{4+}}\)
4 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}}\)
Explanation:
\(\mathrm{2 \mathrm{I}^{-}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \stackrel{\mathrm{Fe}(\mathrm{III})}{\longrightarrow} \mathrm{I}_{2}+2 \mathrm{SO}_{4}^{2-}}\) Role of Fe (III) ions : \(\rm{\begin{aligned}& 2 \mathrm{Fe}^{3+}+2 \mathrm{I}^{-} \rightarrow 2 \mathrm{Fe}^{2+}+\mathrm{I}_{2} \\& 2 \mathrm{Fe}^{2+}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \rightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{SO}_{4}^{2-}\end{aligned}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321385
Assertion : Transition metals are good catalysts. Reason : \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Transition metals, owing to their expansive surface area and the capacity for variable valencies, readily create intermediate activated complexes. This unique property makes them highly effective catalysts. \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in Contact process. But it is not the exact reason for the given assertion. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321386
Identify the incorrect pair from the following
1 Wacker process - \({\mathrm{\mathrm{PtCl}_{2}}}\)
In Wacker process, \({\mathrm{\mathrm{PdCl}_{2}}}\) is used as catalyst, not \({\mathrm{\mathrm{PtCl}_{2}}}\). So, the correct option is (1).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321387
Among the following, the incorrect statement is
1 catalyst in the contact process is Vanadium (V) oxide
2 catalyst in the Haber's process is finely divided iron.
3 catalyst in the Ostwald's process is Pt gauge
4 catalyst in the Deacon's process is Cuprous chloride, \(\mathrm{\left(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\right)}\).
Explanation:
Deacons process is \(\mathrm{4 \mathrm{HCl}+\mathrm{O}_{2} \stackrel{\mathrm{CuCl}_{2}}{\longrightarrow} 2 \mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
321384
Transition metals can act as catalysts because these can change their oxidation state. How does \(\mathrm{\mathrm{Fe}(\mathrm{III})}\) catalyse the reaction between iodide and persulphate ions?
1 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{+}}\)
3 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{4+}}\)
4 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}}\)
Explanation:
\(\mathrm{2 \mathrm{I}^{-}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \stackrel{\mathrm{Fe}(\mathrm{III})}{\longrightarrow} \mathrm{I}_{2}+2 \mathrm{SO}_{4}^{2-}}\) Role of Fe (III) ions : \(\rm{\begin{aligned}& 2 \mathrm{Fe}^{3+}+2 \mathrm{I}^{-} \rightarrow 2 \mathrm{Fe}^{2+}+\mathrm{I}_{2} \\& 2 \mathrm{Fe}^{2+}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \rightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{SO}_{4}^{2-}\end{aligned}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321385
Assertion : Transition metals are good catalysts. Reason : \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Transition metals, owing to their expansive surface area and the capacity for variable valencies, readily create intermediate activated complexes. This unique property makes them highly effective catalysts. \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in Contact process. But it is not the exact reason for the given assertion. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321386
Identify the incorrect pair from the following
1 Wacker process - \({\mathrm{\mathrm{PtCl}_{2}}}\)
In Wacker process, \({\mathrm{\mathrm{PdCl}_{2}}}\) is used as catalyst, not \({\mathrm{\mathrm{PtCl}_{2}}}\). So, the correct option is (1).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321387
Among the following, the incorrect statement is
1 catalyst in the contact process is Vanadium (V) oxide
2 catalyst in the Haber's process is finely divided iron.
3 catalyst in the Ostwald's process is Pt gauge
4 catalyst in the Deacon's process is Cuprous chloride, \(\mathrm{\left(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\right)}\).
Explanation:
Deacons process is \(\mathrm{4 \mathrm{HCl}+\mathrm{O}_{2} \stackrel{\mathrm{CuCl}_{2}}{\longrightarrow} 2 \mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
321384
Transition metals can act as catalysts because these can change their oxidation state. How does \(\mathrm{\mathrm{Fe}(\mathrm{III})}\) catalyse the reaction between iodide and persulphate ions?
1 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{+}}\)
3 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{4+}}\)
4 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}}\)
Explanation:
\(\mathrm{2 \mathrm{I}^{-}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \stackrel{\mathrm{Fe}(\mathrm{III})}{\longrightarrow} \mathrm{I}_{2}+2 \mathrm{SO}_{4}^{2-}}\) Role of Fe (III) ions : \(\rm{\begin{aligned}& 2 \mathrm{Fe}^{3+}+2 \mathrm{I}^{-} \rightarrow 2 \mathrm{Fe}^{2+}+\mathrm{I}_{2} \\& 2 \mathrm{Fe}^{2+}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \rightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{SO}_{4}^{2-}\end{aligned}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321385
Assertion : Transition metals are good catalysts. Reason : \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Transition metals, owing to their expansive surface area and the capacity for variable valencies, readily create intermediate activated complexes. This unique property makes them highly effective catalysts. \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in Contact process. But it is not the exact reason for the given assertion. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321386
Identify the incorrect pair from the following
1 Wacker process - \({\mathrm{\mathrm{PtCl}_{2}}}\)
In Wacker process, \({\mathrm{\mathrm{PdCl}_{2}}}\) is used as catalyst, not \({\mathrm{\mathrm{PtCl}_{2}}}\). So, the correct option is (1).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321387
Among the following, the incorrect statement is
1 catalyst in the contact process is Vanadium (V) oxide
2 catalyst in the Haber's process is finely divided iron.
3 catalyst in the Ostwald's process is Pt gauge
4 catalyst in the Deacon's process is Cuprous chloride, \(\mathrm{\left(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\right)}\).
Explanation:
Deacons process is \(\mathrm{4 \mathrm{HCl}+\mathrm{O}_{2} \stackrel{\mathrm{CuCl}_{2}}{\longrightarrow} 2 \mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
321384
Transition metals can act as catalysts because these can change their oxidation state. How does \(\mathrm{\mathrm{Fe}(\mathrm{III})}\) catalyse the reaction between iodide and persulphate ions?
1 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{+}}\)
3 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}^{4+}}\)
4 \(\mathrm{\mathrm{Fe}^{3+}}\) to \(\mathrm{\mathrm{Fe}}\)
Explanation:
\(\mathrm{2 \mathrm{I}^{-}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \stackrel{\mathrm{Fe}(\mathrm{III})}{\longrightarrow} \mathrm{I}_{2}+2 \mathrm{SO}_{4}^{2-}}\) Role of Fe (III) ions : \(\rm{\begin{aligned}& 2 \mathrm{Fe}^{3+}+2 \mathrm{I}^{-} \rightarrow 2 \mathrm{Fe}^{2+}+\mathrm{I}_{2} \\& 2 \mathrm{Fe}^{2+}+\mathrm{S}_{2} \mathrm{O}_{8}^{2-} \rightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{SO}_{4}^{2-}\end{aligned}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321385
Assertion : Transition metals are good catalysts. Reason : \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Transition metals, owing to their expansive surface area and the capacity for variable valencies, readily create intermediate activated complexes. This unique property makes them highly effective catalysts. \(\mathrm{V}_{2} \mathrm{O}_{5}\) or Pt is used in Contact process. But it is not the exact reason for the given assertion. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321386
Identify the incorrect pair from the following
1 Wacker process - \({\mathrm{\mathrm{PtCl}_{2}}}\)
In Wacker process, \({\mathrm{\mathrm{PdCl}_{2}}}\) is used as catalyst, not \({\mathrm{\mathrm{PtCl}_{2}}}\). So, the correct option is (1).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321387
Among the following, the incorrect statement is
1 catalyst in the contact process is Vanadium (V) oxide
2 catalyst in the Haber's process is finely divided iron.
3 catalyst in the Ostwald's process is Pt gauge
4 catalyst in the Deacon's process is Cuprous chloride, \(\mathrm{\left(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\right)}\).
Explanation:
Deacons process is \(\mathrm{4 \mathrm{HCl}+\mathrm{O}_{2} \stackrel{\mathrm{CuCl}_{2}}{\longrightarrow} 2 \mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
