Compounds of transition elements
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CHXII08:THE D- & F-BLOCK ELEMENTS

321344 In the reaction between moist \({\mathrm{\mathrm{SO}_{2}}}\) and acidified permanganate solution :

1 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{4}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{Mn}^{2+}}}\)
2 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to S
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is oxidised to \({\mathrm{\mathrm{MnO}_{4}}}\)
3 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{3}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{2}}}\)
4 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to \({\mathrm{\mathrm{H}_{2} \mathrm{~S}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{4}}}\)
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321345 The two physical properties of \(\mathrm{\mathrm{KMnO}_{4}}\) of considerable interest are
I. High temperature dependent paramagnetism
II. Low temperature dependent paramagnetism
III. Intense colour
IV. Diamagnetic behaviour
Choose the correct set of option.

1 I and III
2 II and IV
3 I and IV
4 II and IV
CHXII08:THE D- & F-BLOCK ELEMENTS

321346 Why is \(\mathrm{\mathrm{HCl}}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{\mathrm{KMnO}_{4}}\) in acidic medium?

1 Both \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{KMnO}_{4}}\) act as oxidising agents.
2 \(\mathrm{\mathrm{KMnO}_{4}}\) oxidises \(\mathrm{\mathrm{HCl}}\) into \(\mathrm{\mathrm{Cl}_{2}}\) which is also an oxidising agent.
3 \(\mathrm{\mathrm{KMnO}_{4}}\) is a weaker oxidising agent than \(\mathrm{\mathrm{HCl}}\).
4 \(\mathrm{\mathrm{KMnO}_{4}}\) acts as a reducing agent in the presence of \(\mathrm{\mathrm{HCl}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321347 \({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}{\text{.}}}]{{{{\text{H}}^{\text{ + }}}}}{{\text{M}}^{{\text{x + }}}}\)
\({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}}]{{{\text{0}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{M}}{{\text{n}}^{{\text{y + }}}}\)
\({{\text{K}}_{\text{2}}}{\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}\xrightarrow{{{\text{O}}{{\text{H}}^{\text{ - }}}}}{\text{C}}{{\text{r}}^{{\text{z + }}}}\) \(\left( {{\text{x + y + z}}} \right)\) value is:
(here \(\mathrm{\mathrm{x}, \mathrm{y}}\) and \(\mathrm{\mathrm{z}}\) are oxidation states)

1 20
2 12
3 15
4 30
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CHXII08:THE D- & F-BLOCK ELEMENTS

321344 In the reaction between moist \({\mathrm{\mathrm{SO}_{2}}}\) and acidified permanganate solution :

1 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{4}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{Mn}^{2+}}}\)
2 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to S
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is oxidised to \({\mathrm{\mathrm{MnO}_{4}}}\)
3 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{3}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{2}}}\)
4 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to \({\mathrm{\mathrm{H}_{2} \mathrm{~S}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{4}}}\)
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321345 The two physical properties of \(\mathrm{\mathrm{KMnO}_{4}}\) of considerable interest are
I. High temperature dependent paramagnetism
II. Low temperature dependent paramagnetism
III. Intense colour
IV. Diamagnetic behaviour
Choose the correct set of option.

1 I and III
2 II and IV
3 I and IV
4 II and IV
CHXII08:THE D- & F-BLOCK ELEMENTS

321346 Why is \(\mathrm{\mathrm{HCl}}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{\mathrm{KMnO}_{4}}\) in acidic medium?

1 Both \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{KMnO}_{4}}\) act as oxidising agents.
2 \(\mathrm{\mathrm{KMnO}_{4}}\) oxidises \(\mathrm{\mathrm{HCl}}\) into \(\mathrm{\mathrm{Cl}_{2}}\) which is also an oxidising agent.
3 \(\mathrm{\mathrm{KMnO}_{4}}\) is a weaker oxidising agent than \(\mathrm{\mathrm{HCl}}\).
4 \(\mathrm{\mathrm{KMnO}_{4}}\) acts as a reducing agent in the presence of \(\mathrm{\mathrm{HCl}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321347 \({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}{\text{.}}}]{{{{\text{H}}^{\text{ + }}}}}{{\text{M}}^{{\text{x + }}}}\)
\({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}}]{{{\text{0}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{M}}{{\text{n}}^{{\text{y + }}}}\)
\({{\text{K}}_{\text{2}}}{\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}\xrightarrow{{{\text{O}}{{\text{H}}^{\text{ - }}}}}{\text{C}}{{\text{r}}^{{\text{z + }}}}\) \(\left( {{\text{x + y + z}}} \right)\) value is:
(here \(\mathrm{\mathrm{x}, \mathrm{y}}\) and \(\mathrm{\mathrm{z}}\) are oxidation states)

1 20
2 12
3 15
4 30
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CHXII08:THE D- & F-BLOCK ELEMENTS

321344 In the reaction between moist \({\mathrm{\mathrm{SO}_{2}}}\) and acidified permanganate solution :

1 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{4}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{Mn}^{2+}}}\)
2 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to S
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is oxidised to \({\mathrm{\mathrm{MnO}_{4}}}\)
3 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{3}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{2}}}\)
4 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to \({\mathrm{\mathrm{H}_{2} \mathrm{~S}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{4}}}\)
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321345 The two physical properties of \(\mathrm{\mathrm{KMnO}_{4}}\) of considerable interest are
I. High temperature dependent paramagnetism
II. Low temperature dependent paramagnetism
III. Intense colour
IV. Diamagnetic behaviour
Choose the correct set of option.

1 I and III
2 II and IV
3 I and IV
4 II and IV
CHXII08:THE D- & F-BLOCK ELEMENTS

321346 Why is \(\mathrm{\mathrm{HCl}}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{\mathrm{KMnO}_{4}}\) in acidic medium?

1 Both \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{KMnO}_{4}}\) act as oxidising agents.
2 \(\mathrm{\mathrm{KMnO}_{4}}\) oxidises \(\mathrm{\mathrm{HCl}}\) into \(\mathrm{\mathrm{Cl}_{2}}\) which is also an oxidising agent.
3 \(\mathrm{\mathrm{KMnO}_{4}}\) is a weaker oxidising agent than \(\mathrm{\mathrm{HCl}}\).
4 \(\mathrm{\mathrm{KMnO}_{4}}\) acts as a reducing agent in the presence of \(\mathrm{\mathrm{HCl}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321347 \({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}{\text{.}}}]{{{{\text{H}}^{\text{ + }}}}}{{\text{M}}^{{\text{x + }}}}\)
\({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}}]{{{\text{0}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{M}}{{\text{n}}^{{\text{y + }}}}\)
\({{\text{K}}_{\text{2}}}{\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}\xrightarrow{{{\text{O}}{{\text{H}}^{\text{ - }}}}}{\text{C}}{{\text{r}}^{{\text{z + }}}}\) \(\left( {{\text{x + y + z}}} \right)\) value is:
(here \(\mathrm{\mathrm{x}, \mathrm{y}}\) and \(\mathrm{\mathrm{z}}\) are oxidation states)

1 20
2 12
3 15
4 30
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CHXII08:THE D- & F-BLOCK ELEMENTS

321344 In the reaction between moist \({\mathrm{\mathrm{SO}_{2}}}\) and acidified permanganate solution :

1 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{4}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{Mn}^{2+}}}\)
2 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to S
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is oxidised to \({\mathrm{\mathrm{MnO}_{4}}}\)
3 \({\mathrm{\mathrm{SO}_{2}}}\) is oxidised to \({\mathrm{\mathrm{SO}_{3}^{2-}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{2}}}\)
4 \({\mathrm{\mathrm{SO}_{2}}}\) is reduced to \({\mathrm{\mathrm{H}_{2} \mathrm{~S}}}\)
\({\mathrm{\mathrm{MnO}_{4}^{-}}}\)is reduced to \({\mathrm{\mathrm{MnO}_{4}}}\)
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321345 The two physical properties of \(\mathrm{\mathrm{KMnO}_{4}}\) of considerable interest are
I. High temperature dependent paramagnetism
II. Low temperature dependent paramagnetism
III. Intense colour
IV. Diamagnetic behaviour
Choose the correct set of option.

1 I and III
2 II and IV
3 I and IV
4 II and IV
CHXII08:THE D- & F-BLOCK ELEMENTS

321346 Why is \(\mathrm{\mathrm{HCl}}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{\mathrm{KMnO}_{4}}\) in acidic medium?

1 Both \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{KMnO}_{4}}\) act as oxidising agents.
2 \(\mathrm{\mathrm{KMnO}_{4}}\) oxidises \(\mathrm{\mathrm{HCl}}\) into \(\mathrm{\mathrm{Cl}_{2}}\) which is also an oxidising agent.
3 \(\mathrm{\mathrm{KMnO}_{4}}\) is a weaker oxidising agent than \(\mathrm{\mathrm{HCl}}\).
4 \(\mathrm{\mathrm{KMnO}_{4}}\) acts as a reducing agent in the presence of \(\mathrm{\mathrm{HCl}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321347 \({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}{\text{.}}}]{{{{\text{H}}^{\text{ + }}}}}{{\text{M}}^{{\text{x + }}}}\)
\({\text{KMn}}{{\text{O}}_{\text{4}}}\xrightarrow[{{\text{R}}{\text{.A}}}]{{{\text{0}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{M}}{{\text{n}}^{{\text{y + }}}}\)
\({{\text{K}}_{\text{2}}}{\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}\xrightarrow{{{\text{O}}{{\text{H}}^{\text{ - }}}}}{\text{C}}{{\text{r}}^{{\text{z + }}}}\) \(\left( {{\text{x + y + z}}} \right)\) value is:
(here \(\mathrm{\mathrm{x}, \mathrm{y}}\) and \(\mathrm{\mathrm{z}}\) are oxidation states)

1 20
2 12
3 15
4 30
For More Updates join with Us