Compounds of transition elements
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NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII08:THE D- & F-BLOCK ELEMENTS

321318 Which ore is used for the preparation of \(\mathrm{KMnO}_{4}\) ?

1 Pyrolusite
2 Wolframite
3 Cerrusite
4 Casseterite
CHXII08:THE D- & F-BLOCK ELEMENTS

321319 Pyrolusite is \(\mathrm{MnO}_{2}\), and is used to prepare \(\mathrm{KMnO}_{4.}\) The Steps are
\(\mathrm{MnO}_{2} \xrightarrow{\mathrm{I}} \mathrm{MnO}_{4}^{2-} \xrightarrow{\mathrm{II}} \mathrm{MnO}_{4}^{-}\)
Steps I and II are respectively:

1 Fuse with \(\mathrm{KOH} /\) air and electrolytic oxidation.
2 Fuse with \(\mathrm{KOH} / \mathrm{KNO}_{3}\) and electrolytic oxidation.
3 Both (1) and (2).
4 Dissolve in \(\mathrm{H}_{2} \mathrm{O}\) and oxidation.
CHXII08:THE D- & F-BLOCK ELEMENTS

321320 Name the gas that can readily decolourise acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution:

1 \(\mathrm{\mathrm{SO}_{2}}\)
2 \(\mathrm{\mathrm{NO}_{2}}\)
3 \(\mathrm{\mathrm{P}_{2} \mathrm{O}_{5}}\)
4 \(\mathrm{\mathrm{CO}_{2}}\)
NEET - 2017
CHXII08:THE D- & F-BLOCK ELEMENTS

321321 \({\mathrm{\mathrm{KMnO}_{4}}}\) decomposes on heating at 513 K to form \({\mathrm{\mathrm{O}_{2}}}\) along with

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

321318 Which ore is used for the preparation of \(\mathrm{KMnO}_{4}\) ?

1 Pyrolusite
2 Wolframite
3 Cerrusite
4 Casseterite
CHXII08:THE D- & F-BLOCK ELEMENTS

321319 Pyrolusite is \(\mathrm{MnO}_{2}\), and is used to prepare \(\mathrm{KMnO}_{4.}\) The Steps are
\(\mathrm{MnO}_{2} \xrightarrow{\mathrm{I}} \mathrm{MnO}_{4}^{2-} \xrightarrow{\mathrm{II}} \mathrm{MnO}_{4}^{-}\)
Steps I and II are respectively:

1 Fuse with \(\mathrm{KOH} /\) air and electrolytic oxidation.
2 Fuse with \(\mathrm{KOH} / \mathrm{KNO}_{3}\) and electrolytic oxidation.
3 Both (1) and (2).
4 Dissolve in \(\mathrm{H}_{2} \mathrm{O}\) and oxidation.
CHXII08:THE D- & F-BLOCK ELEMENTS

321320 Name the gas that can readily decolourise acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution:

1 \(\mathrm{\mathrm{SO}_{2}}\)
2 \(\mathrm{\mathrm{NO}_{2}}\)
3 \(\mathrm{\mathrm{P}_{2} \mathrm{O}_{5}}\)
4 \(\mathrm{\mathrm{CO}_{2}}\)
NEET - 2017
CHXII08:THE D- & F-BLOCK ELEMENTS

321321 \({\mathrm{\mathrm{KMnO}_{4}}}\) decomposes on heating at 513 K to form \({\mathrm{\mathrm{O}_{2}}}\) along with

1 \({\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}}\) and \({\mathrm{\mathrm{MnO}_{2}}}\)
2 Mn and \({\mathrm{\mathrm{KO}_{2}}}\)
3 \({\mathrm{\mathrm{MnO}_{2}}}\) and \({\mathrm{\mathrm{K}_{2} \mathrm{O}_{2}}}\)
4 \({\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}}\) and Mn
JEE Main - 2024
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CHXII08:THE D- & F-BLOCK ELEMENTS

321318 Which ore is used for the preparation of \(\mathrm{KMnO}_{4}\) ?

1 Pyrolusite
2 Wolframite
3 Cerrusite
4 Casseterite
CHXII08:THE D- & F-BLOCK ELEMENTS

321319 Pyrolusite is \(\mathrm{MnO}_{2}\), and is used to prepare \(\mathrm{KMnO}_{4.}\) The Steps are
\(\mathrm{MnO}_{2} \xrightarrow{\mathrm{I}} \mathrm{MnO}_{4}^{2-} \xrightarrow{\mathrm{II}} \mathrm{MnO}_{4}^{-}\)
Steps I and II are respectively:

1 Fuse with \(\mathrm{KOH} /\) air and electrolytic oxidation.
2 Fuse with \(\mathrm{KOH} / \mathrm{KNO}_{3}\) and electrolytic oxidation.
3 Both (1) and (2).
4 Dissolve in \(\mathrm{H}_{2} \mathrm{O}\) and oxidation.
CHXII08:THE D- & F-BLOCK ELEMENTS

321320 Name the gas that can readily decolourise acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution:

1 \(\mathrm{\mathrm{SO}_{2}}\)
2 \(\mathrm{\mathrm{NO}_{2}}\)
3 \(\mathrm{\mathrm{P}_{2} \mathrm{O}_{5}}\)
4 \(\mathrm{\mathrm{CO}_{2}}\)
NEET - 2017
CHXII08:THE D- & F-BLOCK ELEMENTS

321321 \({\mathrm{\mathrm{KMnO}_{4}}}\) decomposes on heating at 513 K to form \({\mathrm{\mathrm{O}_{2}}}\) along with

1 \({\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}}\) and \({\mathrm{\mathrm{MnO}_{2}}}\)
2 Mn and \({\mathrm{\mathrm{KO}_{2}}}\)
3 \({\mathrm{\mathrm{MnO}_{2}}}\) and \({\mathrm{\mathrm{K}_{2} \mathrm{O}_{2}}}\)
4 \({\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}}\) and Mn
JEE Main - 2024
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII08:THE D- & F-BLOCK ELEMENTS

321318 Which ore is used for the preparation of \(\mathrm{KMnO}_{4}\) ?

1 Pyrolusite
2 Wolframite
3 Cerrusite
4 Casseterite
CHXII08:THE D- & F-BLOCK ELEMENTS

321319 Pyrolusite is \(\mathrm{MnO}_{2}\), and is used to prepare \(\mathrm{KMnO}_{4.}\) The Steps are
\(\mathrm{MnO}_{2} \xrightarrow{\mathrm{I}} \mathrm{MnO}_{4}^{2-} \xrightarrow{\mathrm{II}} \mathrm{MnO}_{4}^{-}\)
Steps I and II are respectively:

1 Fuse with \(\mathrm{KOH} /\) air and electrolytic oxidation.
2 Fuse with \(\mathrm{KOH} / \mathrm{KNO}_{3}\) and electrolytic oxidation.
3 Both (1) and (2).
4 Dissolve in \(\mathrm{H}_{2} \mathrm{O}\) and oxidation.
CHXII08:THE D- & F-BLOCK ELEMENTS

321320 Name the gas that can readily decolourise acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution:

1 \(\mathrm{\mathrm{SO}_{2}}\)
2 \(\mathrm{\mathrm{NO}_{2}}\)
3 \(\mathrm{\mathrm{P}_{2} \mathrm{O}_{5}}\)
4 \(\mathrm{\mathrm{CO}_{2}}\)
NEET - 2017
CHXII08:THE D- & F-BLOCK ELEMENTS

321321 \({\mathrm{\mathrm{KMnO}_{4}}}\) decomposes on heating at 513 K to form \({\mathrm{\mathrm{O}_{2}}}\) along with

1 \({\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}}\) and \({\mathrm{\mathrm{MnO}_{2}}}\)
2 Mn and \({\mathrm{\mathrm{KO}_{2}}}\)
3 \({\mathrm{\mathrm{MnO}_{2}}}\) and \({\mathrm{\mathrm{K}_{2} \mathrm{O}_{2}}}\)
4 \({\mathrm{\mathrm{K}_{2} \mathrm{MnO}_{4}}}\) and Mn
JEE Main - 2024
NEET DIGITAL LIBRARY