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:
Electronic configuration of \(\mathrm{Cr}:[\mathrm{Ar}] 4 \mathrm{~s}^{1} 3 \mathrm{~d}^{5}\). In \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \mathrm{Cr}\) is in +3 oxidation state Electronic configuration of \(\mathrm{Cr}^{3+}:[\mathrm{Ar}] 3 \mathrm{~d}^{3}\) Due to the presence of unpaired electrons, it is paramagnetic. So the option (2) is correct.
CHXII09:COORDINATION COMPOUNDS
322309
The spin-only magnetic moment of the complex [V( \({\mathrm{\left.\left.\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}}}\) is
1 \(\sqrt {15} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
2 \(\sqrt 3 \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
3 \(\sqrt {24} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
4 \(\sqrt {35} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
Explanation:
\({\mathrm{\left[\mathrm{V}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2} \Rightarrow \mathrm{V}^{2+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{3}}}\) The complex has 3 unpaired electrons. \({\mathrm{\therefore \mu=\sqrt{n(n+2)}}}\) B.M. \({\mathrm{=\sqrt{3(3+2)}}}\) B.M. \({\mathrm{=\sqrt{15}}}\) B.M. \({\mathrm{\therefore}}\) The value of ' X ' is 15 .
CHXII09:COORDINATION COMPOUNDS
322310
The value of 'spin only' magnetic moment for one of the following configuration is 2.84 B.M. The correct one is:
1 \({{\text{d}}^{\text{6}}}\) (in strong field ligand)
2 \({{\text{d}}^{\text{2}}}\) (in weak field ligand)
3 \({{\text{d}}^{\text{3}}}\) (in weak as well as in strong field ligand)
4 \({{\text{d}}^{\text{5}}}\) (in strong field ligand)
Explanation:
Magnetic moment \({\text{ = }}\sqrt {{\text{n(n + 2)}}} {\text{ = 2}}{\text{.84}}\) \(\therefore {\text{n = 2}}\) (i.e., number of unpaired electron)
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:
Electronic configuration of \(\mathrm{Cr}:[\mathrm{Ar}] 4 \mathrm{~s}^{1} 3 \mathrm{~d}^{5}\). In \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \mathrm{Cr}\) is in +3 oxidation state Electronic configuration of \(\mathrm{Cr}^{3+}:[\mathrm{Ar}] 3 \mathrm{~d}^{3}\) Due to the presence of unpaired electrons, it is paramagnetic. So the option (2) is correct.
CHXII09:COORDINATION COMPOUNDS
322309
The spin-only magnetic moment of the complex [V( \({\mathrm{\left.\left.\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}}}\) is
1 \(\sqrt {15} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
2 \(\sqrt 3 \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
3 \(\sqrt {24} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
4 \(\sqrt {35} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
Explanation:
\({\mathrm{\left[\mathrm{V}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2} \Rightarrow \mathrm{V}^{2+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{3}}}\) The complex has 3 unpaired electrons. \({\mathrm{\therefore \mu=\sqrt{n(n+2)}}}\) B.M. \({\mathrm{=\sqrt{3(3+2)}}}\) B.M. \({\mathrm{=\sqrt{15}}}\) B.M. \({\mathrm{\therefore}}\) The value of ' X ' is 15 .
CHXII09:COORDINATION COMPOUNDS
322310
The value of 'spin only' magnetic moment for one of the following configuration is 2.84 B.M. The correct one is:
1 \({{\text{d}}^{\text{6}}}\) (in strong field ligand)
2 \({{\text{d}}^{\text{2}}}\) (in weak field ligand)
3 \({{\text{d}}^{\text{3}}}\) (in weak as well as in strong field ligand)
4 \({{\text{d}}^{\text{5}}}\) (in strong field ligand)
Explanation:
Magnetic moment \({\text{ = }}\sqrt {{\text{n(n + 2)}}} {\text{ = 2}}{\text{.84}}\) \(\therefore {\text{n = 2}}\) (i.e., number of unpaired electron)
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:
Electronic configuration of \(\mathrm{Cr}:[\mathrm{Ar}] 4 \mathrm{~s}^{1} 3 \mathrm{~d}^{5}\). In \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \mathrm{Cr}\) is in +3 oxidation state Electronic configuration of \(\mathrm{Cr}^{3+}:[\mathrm{Ar}] 3 \mathrm{~d}^{3}\) Due to the presence of unpaired electrons, it is paramagnetic. So the option (2) is correct.
CHXII09:COORDINATION COMPOUNDS
322309
The spin-only magnetic moment of the complex [V( \({\mathrm{\left.\left.\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}}}\) is
1 \(\sqrt {15} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
2 \(\sqrt 3 \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
3 \(\sqrt {24} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
4 \(\sqrt {35} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
Explanation:
\({\mathrm{\left[\mathrm{V}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2} \Rightarrow \mathrm{V}^{2+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{3}}}\) The complex has 3 unpaired electrons. \({\mathrm{\therefore \mu=\sqrt{n(n+2)}}}\) B.M. \({\mathrm{=\sqrt{3(3+2)}}}\) B.M. \({\mathrm{=\sqrt{15}}}\) B.M. \({\mathrm{\therefore}}\) The value of ' X ' is 15 .
CHXII09:COORDINATION COMPOUNDS
322310
The value of 'spin only' magnetic moment for one of the following configuration is 2.84 B.M. The correct one is:
1 \({{\text{d}}^{\text{6}}}\) (in strong field ligand)
2 \({{\text{d}}^{\text{2}}}\) (in weak field ligand)
3 \({{\text{d}}^{\text{3}}}\) (in weak as well as in strong field ligand)
4 \({{\text{d}}^{\text{5}}}\) (in strong field ligand)
Explanation:
Magnetic moment \({\text{ = }}\sqrt {{\text{n(n + 2)}}} {\text{ = 2}}{\text{.84}}\) \(\therefore {\text{n = 2}}\) (i.e., number of unpaired electron)
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:
Electronic configuration of \(\mathrm{Cr}:[\mathrm{Ar}] 4 \mathrm{~s}^{1} 3 \mathrm{~d}^{5}\). In \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \mathrm{Cr}\) is in +3 oxidation state Electronic configuration of \(\mathrm{Cr}^{3+}:[\mathrm{Ar}] 3 \mathrm{~d}^{3}\) Due to the presence of unpaired electrons, it is paramagnetic. So the option (2) is correct.
CHXII09:COORDINATION COMPOUNDS
322309
The spin-only magnetic moment of the complex [V( \({\mathrm{\left.\left.\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}}}\) is
1 \(\sqrt {15} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
2 \(\sqrt 3 \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
3 \(\sqrt {24} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
4 \(\sqrt {35} \,{\rm{B}}{\rm{.M}}{\rm{.}}\)
Explanation:
\({\mathrm{\left[\mathrm{V}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2} \Rightarrow \mathrm{V}^{2+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{3}}}\) The complex has 3 unpaired electrons. \({\mathrm{\therefore \mu=\sqrt{n(n+2)}}}\) B.M. \({\mathrm{=\sqrt{3(3+2)}}}\) B.M. \({\mathrm{=\sqrt{15}}}\) B.M. \({\mathrm{\therefore}}\) The value of ' X ' is 15 .
CHXII09:COORDINATION COMPOUNDS
322310
The value of 'spin only' magnetic moment for one of the following configuration is 2.84 B.M. The correct one is:
1 \({{\text{d}}^{\text{6}}}\) (in strong field ligand)
2 \({{\text{d}}^{\text{2}}}\) (in weak field ligand)
3 \({{\text{d}}^{\text{3}}}\) (in weak as well as in strong field ligand)
4 \({{\text{d}}^{\text{5}}}\) (in strong field ligand)
Explanation:
Magnetic moment \({\text{ = }}\sqrt {{\text{n(n + 2)}}} {\text{ = 2}}{\text{.84}}\) \(\therefore {\text{n = 2}}\) (i.e., number of unpaired electron)
