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

321309 The mineral from which potassium permanganate manufactured is?

1 Pyrolusite, \(\mathrm{\mathrm{MnO}_{2}}\)
2 Branuite, \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
3 Hausmannite, \(\mathrm{\mathrm{Mn}_{3} \mathrm{O}_{4}}\)
4 Manganite, \(\mathrm{\mathrm{MnO}_{3} \cdot \mathrm{H}_{2} \mathrm{O}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321310 Why is \(\mathrm{HCl}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{KMnO}_{4}\) in acidic medium?

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

321311 In dilute alkaline medium, the equivalent mass of \(\mathrm{\mathrm{KMnO}_{4}}\) is

1 \(\mathrm{\dfrac{M}{1}}\)
2 \(\mathrm{\dfrac{M}{5}}\)
3 \(\mathrm{\dfrac{M}{6}}\)
4 \(\mathrm{\dfrac{M}{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321312 Identify the products P and Q in given reactions.
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{H}^{+}} \mathrm{P}+\mathrm{Mn}^{2+}\)
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{OH}^{-}} \mathrm{IO}_{3}^{-}+\mathrm{Q}\)

1 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{MnO}_{2}\) respectively
2 \(\mathrm{I}_{2}\) and \(\mathrm{Mn}^{2+}\) respectively
3 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{Mn}^{2+}\) respectively
4 \(\mathrm{I}_{2}\) and \(\mathrm{MnO}_{2}\) respectively
CHXII08:THE D- & F-BLOCK ELEMENTS

321313 A purple coloured solution is made alkaline with \(\mathrm{\mathrm{KOH}}\) and is treated with \(\mathrm{\mathrm{KI}}\) forming potassium iodate. The same solution is acidified with \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) and again it is treated with KI. However this time instead of potassium iodate, iodine gas is released. The purple coloured solution is of

1 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\)
2 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{4}}\)
3 \(\mathrm{\mathrm{KMnO}_{4}}\)
4 \(\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}\)
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321309 The mineral from which potassium permanganate manufactured is?

1 Pyrolusite, \(\mathrm{\mathrm{MnO}_{2}}\)
2 Branuite, \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
3 Hausmannite, \(\mathrm{\mathrm{Mn}_{3} \mathrm{O}_{4}}\)
4 Manganite, \(\mathrm{\mathrm{MnO}_{3} \cdot \mathrm{H}_{2} \mathrm{O}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321310 Why is \(\mathrm{HCl}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{KMnO}_{4}\) in acidic medium?

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

321311 In dilute alkaline medium, the equivalent mass of \(\mathrm{\mathrm{KMnO}_{4}}\) is

1 \(\mathrm{\dfrac{M}{1}}\)
2 \(\mathrm{\dfrac{M}{5}}\)
3 \(\mathrm{\dfrac{M}{6}}\)
4 \(\mathrm{\dfrac{M}{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321312 Identify the products P and Q in given reactions.
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{H}^{+}} \mathrm{P}+\mathrm{Mn}^{2+}\)
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{OH}^{-}} \mathrm{IO}_{3}^{-}+\mathrm{Q}\)

1 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{MnO}_{2}\) respectively
2 \(\mathrm{I}_{2}\) and \(\mathrm{Mn}^{2+}\) respectively
3 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{Mn}^{2+}\) respectively
4 \(\mathrm{I}_{2}\) and \(\mathrm{MnO}_{2}\) respectively
CHXII08:THE D- & F-BLOCK ELEMENTS

321313 A purple coloured solution is made alkaline with \(\mathrm{\mathrm{KOH}}\) and is treated with \(\mathrm{\mathrm{KI}}\) forming potassium iodate. The same solution is acidified with \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) and again it is treated with KI. However this time instead of potassium iodate, iodine gas is released. The purple coloured solution is of

1 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\)
2 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{4}}\)
3 \(\mathrm{\mathrm{KMnO}_{4}}\)
4 \(\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321309 The mineral from which potassium permanganate manufactured is?

1 Pyrolusite, \(\mathrm{\mathrm{MnO}_{2}}\)
2 Branuite, \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
3 Hausmannite, \(\mathrm{\mathrm{Mn}_{3} \mathrm{O}_{4}}\)
4 Manganite, \(\mathrm{\mathrm{MnO}_{3} \cdot \mathrm{H}_{2} \mathrm{O}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321310 Why is \(\mathrm{HCl}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{KMnO}_{4}\) in acidic medium?

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

321311 In dilute alkaline medium, the equivalent mass of \(\mathrm{\mathrm{KMnO}_{4}}\) is

1 \(\mathrm{\dfrac{M}{1}}\)
2 \(\mathrm{\dfrac{M}{5}}\)
3 \(\mathrm{\dfrac{M}{6}}\)
4 \(\mathrm{\dfrac{M}{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321312 Identify the products P and Q in given reactions.
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{H}^{+}} \mathrm{P}+\mathrm{Mn}^{2+}\)
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{OH}^{-}} \mathrm{IO}_{3}^{-}+\mathrm{Q}\)

1 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{MnO}_{2}\) respectively
2 \(\mathrm{I}_{2}\) and \(\mathrm{Mn}^{2+}\) respectively
3 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{Mn}^{2+}\) respectively
4 \(\mathrm{I}_{2}\) and \(\mathrm{MnO}_{2}\) respectively
CHXII08:THE D- & F-BLOCK ELEMENTS

321313 A purple coloured solution is made alkaline with \(\mathrm{\mathrm{KOH}}\) and is treated with \(\mathrm{\mathrm{KI}}\) forming potassium iodate. The same solution is acidified with \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) and again it is treated with KI. However this time instead of potassium iodate, iodine gas is released. The purple coloured solution is of

1 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\)
2 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{4}}\)
3 \(\mathrm{\mathrm{KMnO}_{4}}\)
4 \(\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321309 The mineral from which potassium permanganate manufactured is?

1 Pyrolusite, \(\mathrm{\mathrm{MnO}_{2}}\)
2 Branuite, \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
3 Hausmannite, \(\mathrm{\mathrm{Mn}_{3} \mathrm{O}_{4}}\)
4 Manganite, \(\mathrm{\mathrm{MnO}_{3} \cdot \mathrm{H}_{2} \mathrm{O}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321310 Why is \(\mathrm{HCl}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{KMnO}_{4}\) in acidic medium?

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

321311 In dilute alkaline medium, the equivalent mass of \(\mathrm{\mathrm{KMnO}_{4}}\) is

1 \(\mathrm{\dfrac{M}{1}}\)
2 \(\mathrm{\dfrac{M}{5}}\)
3 \(\mathrm{\dfrac{M}{6}}\)
4 \(\mathrm{\dfrac{M}{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321312 Identify the products P and Q in given reactions.
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{H}^{+}} \mathrm{P}+\mathrm{Mn}^{2+}\)
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{OH}^{-}} \mathrm{IO}_{3}^{-}+\mathrm{Q}\)

1 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{MnO}_{2}\) respectively
2 \(\mathrm{I}_{2}\) and \(\mathrm{Mn}^{2+}\) respectively
3 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{Mn}^{2+}\) respectively
4 \(\mathrm{I}_{2}\) and \(\mathrm{MnO}_{2}\) respectively
CHXII08:THE D- & F-BLOCK ELEMENTS

321313 A purple coloured solution is made alkaline with \(\mathrm{\mathrm{KOH}}\) and is treated with \(\mathrm{\mathrm{KI}}\) forming potassium iodate. The same solution is acidified with \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) and again it is treated with KI. However this time instead of potassium iodate, iodine gas is released. The purple coloured solution is of

1 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\)
2 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{4}}\)
3 \(\mathrm{\mathrm{KMnO}_{4}}\)
4 \(\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}\)
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321309 The mineral from which potassium permanganate manufactured is?

1 Pyrolusite, \(\mathrm{\mathrm{MnO}_{2}}\)
2 Branuite, \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
3 Hausmannite, \(\mathrm{\mathrm{Mn}_{3} \mathrm{O}_{4}}\)
4 Manganite, \(\mathrm{\mathrm{MnO}_{3} \cdot \mathrm{H}_{2} \mathrm{O}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321310 Why is \(\mathrm{HCl}\) not used to make the medium acidic in oxidation reactions of \(\mathrm{KMnO}_{4}\) in acidic medium?

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

321311 In dilute alkaline medium, the equivalent mass of \(\mathrm{\mathrm{KMnO}_{4}}\) is

1 \(\mathrm{\dfrac{M}{1}}\)
2 \(\mathrm{\dfrac{M}{5}}\)
3 \(\mathrm{\dfrac{M}{6}}\)
4 \(\mathrm{\dfrac{M}{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321312 Identify the products P and Q in given reactions.
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{H}^{+}} \mathrm{P}+\mathrm{Mn}^{2+}\)
\(\mathrm{KI}+\mathrm{MnO}_{4}^{-} \xrightarrow{\mathrm{OH}^{-}} \mathrm{IO}_{3}^{-}+\mathrm{Q}\)

1 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{MnO}_{2}\) respectively
2 \(\mathrm{I}_{2}\) and \(\mathrm{Mn}^{2+}\) respectively
3 \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{Mn}^{2+}\) respectively
4 \(\mathrm{I}_{2}\) and \(\mathrm{MnO}_{2}\) respectively
CHXII08:THE D- & F-BLOCK ELEMENTS

321313 A purple coloured solution is made alkaline with \(\mathrm{\mathrm{KOH}}\) and is treated with \(\mathrm{\mathrm{KI}}\) forming potassium iodate. The same solution is acidified with \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) and again it is treated with KI. However this time instead of potassium iodate, iodine gas is released. The purple coloured solution is of

1 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\)
2 \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{4}}\)
3 \(\mathrm{\mathrm{KMnO}_{4}}\)
4 \(\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}\)