NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII08:THE D- & F-BLOCK ELEMENTS
321556
The stability of \(\mathrm{Cu}^{2+}\) is more than \(\mathrm{Cu}^{+}\)salts in aqueous solution due to
1 enthalpy of atomization
2 hydration energy
3 second ionisation enthalpy
4 first ionisation enthalpy
Explanation:
\(\mathrm{Cu}^{+2}\) is more stable than \(\mathrm{Cu}^{+1}\) because released hydration energy is more in case of \(\mathrm{Cu}^{+2}\) than \(\mathrm{Cu}^{+1}\).
NEET - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS
321557
The stability of particular oxidation state of a metal in aqueous solution is determined by:
1 Enthalpy of sublimation of the metal
2 Ionization energy
3 Enthalpy of hydration of the metal ion
4 All of these
Explanation:
\(\mathrm{M_{(s)} \rightarrow M_{(a q)}^{+n}+n e^{-}}\) The above change involves sublimation, ionization and hydration.
CHXII08:THE D- & F-BLOCK ELEMENTS
321558
Which of the following electronic configuration is associated with the highest stable oxidation state?
321559
Which one of the following species is stable in aqueous solution?
1 \(\mathrm{\mathrm{MnO}_{4}^{2-}}\)
2 \(\mathrm{\mathrm{MnO}_{4}^{3-}}\)
3 \(\mathrm{\mathrm{Cu}^{+}}\)
4 \(\mathrm{\mathrm{Cr}^{2+}}\)
Explanation:
(1) \(\mathrm{\mathrm{MnO}_{4}^{2-}}\) disproportionates in neutral or acidic solution. \(\mathrm{3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{2-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\) (3) Many \(\mathrm{\mathrm{Cu}^{+}}\)compounds are unstable in aqueous solution and undergo disproportionation as follows \(\rm{2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}}\)
321556
The stability of \(\mathrm{Cu}^{2+}\) is more than \(\mathrm{Cu}^{+}\)salts in aqueous solution due to
1 enthalpy of atomization
2 hydration energy
3 second ionisation enthalpy
4 first ionisation enthalpy
Explanation:
\(\mathrm{Cu}^{+2}\) is more stable than \(\mathrm{Cu}^{+1}\) because released hydration energy is more in case of \(\mathrm{Cu}^{+2}\) than \(\mathrm{Cu}^{+1}\).
NEET - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS
321557
The stability of particular oxidation state of a metal in aqueous solution is determined by:
1 Enthalpy of sublimation of the metal
2 Ionization energy
3 Enthalpy of hydration of the metal ion
4 All of these
Explanation:
\(\mathrm{M_{(s)} \rightarrow M_{(a q)}^{+n}+n e^{-}}\) The above change involves sublimation, ionization and hydration.
CHXII08:THE D- & F-BLOCK ELEMENTS
321558
Which of the following electronic configuration is associated with the highest stable oxidation state?
321559
Which one of the following species is stable in aqueous solution?
1 \(\mathrm{\mathrm{MnO}_{4}^{2-}}\)
2 \(\mathrm{\mathrm{MnO}_{4}^{3-}}\)
3 \(\mathrm{\mathrm{Cu}^{+}}\)
4 \(\mathrm{\mathrm{Cr}^{2+}}\)
Explanation:
(1) \(\mathrm{\mathrm{MnO}_{4}^{2-}}\) disproportionates in neutral or acidic solution. \(\mathrm{3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{2-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\) (3) Many \(\mathrm{\mathrm{Cu}^{+}}\)compounds are unstable in aqueous solution and undergo disproportionation as follows \(\rm{2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}}\)
321556
The stability of \(\mathrm{Cu}^{2+}\) is more than \(\mathrm{Cu}^{+}\)salts in aqueous solution due to
1 enthalpy of atomization
2 hydration energy
3 second ionisation enthalpy
4 first ionisation enthalpy
Explanation:
\(\mathrm{Cu}^{+2}\) is more stable than \(\mathrm{Cu}^{+1}\) because released hydration energy is more in case of \(\mathrm{Cu}^{+2}\) than \(\mathrm{Cu}^{+1}\).
NEET - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS
321557
The stability of particular oxidation state of a metal in aqueous solution is determined by:
1 Enthalpy of sublimation of the metal
2 Ionization energy
3 Enthalpy of hydration of the metal ion
4 All of these
Explanation:
\(\mathrm{M_{(s)} \rightarrow M_{(a q)}^{+n}+n e^{-}}\) The above change involves sublimation, ionization and hydration.
CHXII08:THE D- & F-BLOCK ELEMENTS
321558
Which of the following electronic configuration is associated with the highest stable oxidation state?
321559
Which one of the following species is stable in aqueous solution?
1 \(\mathrm{\mathrm{MnO}_{4}^{2-}}\)
2 \(\mathrm{\mathrm{MnO}_{4}^{3-}}\)
3 \(\mathrm{\mathrm{Cu}^{+}}\)
4 \(\mathrm{\mathrm{Cr}^{2+}}\)
Explanation:
(1) \(\mathrm{\mathrm{MnO}_{4}^{2-}}\) disproportionates in neutral or acidic solution. \(\mathrm{3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{2-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\) (3) Many \(\mathrm{\mathrm{Cu}^{+}}\)compounds are unstable in aqueous solution and undergo disproportionation as follows \(\rm{2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}}\)
321556
The stability of \(\mathrm{Cu}^{2+}\) is more than \(\mathrm{Cu}^{+}\)salts in aqueous solution due to
1 enthalpy of atomization
2 hydration energy
3 second ionisation enthalpy
4 first ionisation enthalpy
Explanation:
\(\mathrm{Cu}^{+2}\) is more stable than \(\mathrm{Cu}^{+1}\) because released hydration energy is more in case of \(\mathrm{Cu}^{+2}\) than \(\mathrm{Cu}^{+1}\).
NEET - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS
321557
The stability of particular oxidation state of a metal in aqueous solution is determined by:
1 Enthalpy of sublimation of the metal
2 Ionization energy
3 Enthalpy of hydration of the metal ion
4 All of these
Explanation:
\(\mathrm{M_{(s)} \rightarrow M_{(a q)}^{+n}+n e^{-}}\) The above change involves sublimation, ionization and hydration.
CHXII08:THE D- & F-BLOCK ELEMENTS
321558
Which of the following electronic configuration is associated with the highest stable oxidation state?
321559
Which one of the following species is stable in aqueous solution?
1 \(\mathrm{\mathrm{MnO}_{4}^{2-}}\)
2 \(\mathrm{\mathrm{MnO}_{4}^{3-}}\)
3 \(\mathrm{\mathrm{Cu}^{+}}\)
4 \(\mathrm{\mathrm{Cr}^{2+}}\)
Explanation:
(1) \(\mathrm{\mathrm{MnO}_{4}^{2-}}\) disproportionates in neutral or acidic solution. \(\mathrm{3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{2-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\) (3) Many \(\mathrm{\mathrm{Cu}^{+}}\)compounds are unstable in aqueous solution and undergo disproportionation as follows \(\rm{2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}}\)
