274051
Which ion has the least value of theoretical magnetic moment?
1 $\mathrm{Cr}^{3+}$
2 $\mathrm{Co}^{3+}$
3 $\mathrm{Ti}^{3+}$
4 $\mathrm{V}^{3+}$
Explanation:
(C) : (a) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ $=4.9 \text { B.M. }$ (b) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ (c) Number of unpaired electron $=1$ Magnetic moment $=\sqrt{1(1+2)}=\sqrt{3}$ $=1.73 \text { B.M. }$ (d) Number of unpaired electron $=2$ Magnetic moment $=\sqrt{2(2+2)}=\sqrt{8}$ $=2.84 \text { B.M. }$ Hence, $\mathrm{Ti}^{3+}$ has least value theoretical magnetic moment.
GUJCET-2018
COORDINATION COMPOUNDS
274052
A gas metal in bivalent state has approximately $23 \mathrm{e}^{-}$, what is spin magnetic moment in elemental state?
1 2.87
2 5.5
3 5.9
4 4.9
Explanation:
(C) : When metal is present in +2 oxidation state then it contains $23 \mathrm{e}^{-}$ $\mathrm{M}^{2+}: 23 \mathrm{e}^{-}$ $\mathrm{M}: 25 \mathrm{e}^{-}$ Electronic configuration: $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{~s}^{2} 3 \mathrm{~d}^{5}$ Magnetic moment $(\mu)=\sqrt{\mathrm{n}(\mathrm{n}+2)}=\sqrt{5(5+2)}$ $=5.9 \text { B.M. }$
AIIMS-26 May
COORDINATION COMPOUNDS
274053
Which of the following complexes shows paramagnetic?
(C) : If complex compounds contains unpaired electron then it act as paramagnetic. (a) $\left[\mathrm{Zn}\left(\mathrm{NH}_{3}\right)_{3}\right]^{2+} \Rightarrow \mathrm{Zn}^{2+}: \mathrm{d}^{10}$ Number of unpaired electron $=10$ (b) $\mathrm{In}\left[\mathrm{PdCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, $\mathrm{Pd}$ is from $4^{\text {th }}$ period and it act as low spin complex and pairing of metal $\mathrm{d}$ electrons occurs. Number of unpaired electron $=0$ (c) In $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, Ni belongs to $3^{\text {rd }}$ period and $\mathrm{Cl}^{-}, \mathrm{PPh}_{3}$ belongs to weak field ligand so pairing of electron are not possible, $\mathrm{Ni}^{2+}: \mathrm{d}^{8}$ Number of unpaired electron $=2$ Hence, $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPH}_{3}\right)_{2}\right]$ complex shows paramagnetic behavior. (d) In $\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}$ Complex, ethylene diamine act as strong field ligand with $\mathrm{Co}^{3+}$ complex and pairing of metal d- electrons occurs. Number of unpaired electron $=0$
CG PET -2018
COORDINATION COMPOUNDS
274054
Assertion : In Zeise's salt, coordination no. of Pt is five. Reason: Ethene is bidentate ligand.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(D) : In Zeise's salt, $\left[\mathrm{PtCl}_{3}\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)\right]^{-}$coordination number of $\mathrm{Pt}$ is four. Ethene act as monodentate ligand. Hence, both Assertion and Reason are incorrect.
274051
Which ion has the least value of theoretical magnetic moment?
1 $\mathrm{Cr}^{3+}$
2 $\mathrm{Co}^{3+}$
3 $\mathrm{Ti}^{3+}$
4 $\mathrm{V}^{3+}$
Explanation:
(C) : (a) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ $=4.9 \text { B.M. }$ (b) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ (c) Number of unpaired electron $=1$ Magnetic moment $=\sqrt{1(1+2)}=\sqrt{3}$ $=1.73 \text { B.M. }$ (d) Number of unpaired electron $=2$ Magnetic moment $=\sqrt{2(2+2)}=\sqrt{8}$ $=2.84 \text { B.M. }$ Hence, $\mathrm{Ti}^{3+}$ has least value theoretical magnetic moment.
GUJCET-2018
COORDINATION COMPOUNDS
274052
A gas metal in bivalent state has approximately $23 \mathrm{e}^{-}$, what is spin magnetic moment in elemental state?
1 2.87
2 5.5
3 5.9
4 4.9
Explanation:
(C) : When metal is present in +2 oxidation state then it contains $23 \mathrm{e}^{-}$ $\mathrm{M}^{2+}: 23 \mathrm{e}^{-}$ $\mathrm{M}: 25 \mathrm{e}^{-}$ Electronic configuration: $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{~s}^{2} 3 \mathrm{~d}^{5}$ Magnetic moment $(\mu)=\sqrt{\mathrm{n}(\mathrm{n}+2)}=\sqrt{5(5+2)}$ $=5.9 \text { B.M. }$
AIIMS-26 May
COORDINATION COMPOUNDS
274053
Which of the following complexes shows paramagnetic?
(C) : If complex compounds contains unpaired electron then it act as paramagnetic. (a) $\left[\mathrm{Zn}\left(\mathrm{NH}_{3}\right)_{3}\right]^{2+} \Rightarrow \mathrm{Zn}^{2+}: \mathrm{d}^{10}$ Number of unpaired electron $=10$ (b) $\mathrm{In}\left[\mathrm{PdCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, $\mathrm{Pd}$ is from $4^{\text {th }}$ period and it act as low spin complex and pairing of metal $\mathrm{d}$ electrons occurs. Number of unpaired electron $=0$ (c) In $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, Ni belongs to $3^{\text {rd }}$ period and $\mathrm{Cl}^{-}, \mathrm{PPh}_{3}$ belongs to weak field ligand so pairing of electron are not possible, $\mathrm{Ni}^{2+}: \mathrm{d}^{8}$ Number of unpaired electron $=2$ Hence, $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPH}_{3}\right)_{2}\right]$ complex shows paramagnetic behavior. (d) In $\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}$ Complex, ethylene diamine act as strong field ligand with $\mathrm{Co}^{3+}$ complex and pairing of metal d- electrons occurs. Number of unpaired electron $=0$
CG PET -2018
COORDINATION COMPOUNDS
274054
Assertion : In Zeise's salt, coordination no. of Pt is five. Reason: Ethene is bidentate ligand.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(D) : In Zeise's salt, $\left[\mathrm{PtCl}_{3}\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)\right]^{-}$coordination number of $\mathrm{Pt}$ is four. Ethene act as monodentate ligand. Hence, both Assertion and Reason are incorrect.
274051
Which ion has the least value of theoretical magnetic moment?
1 $\mathrm{Cr}^{3+}$
2 $\mathrm{Co}^{3+}$
3 $\mathrm{Ti}^{3+}$
4 $\mathrm{V}^{3+}$
Explanation:
(C) : (a) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ $=4.9 \text { B.M. }$ (b) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ (c) Number of unpaired electron $=1$ Magnetic moment $=\sqrt{1(1+2)}=\sqrt{3}$ $=1.73 \text { B.M. }$ (d) Number of unpaired electron $=2$ Magnetic moment $=\sqrt{2(2+2)}=\sqrt{8}$ $=2.84 \text { B.M. }$ Hence, $\mathrm{Ti}^{3+}$ has least value theoretical magnetic moment.
GUJCET-2018
COORDINATION COMPOUNDS
274052
A gas metal in bivalent state has approximately $23 \mathrm{e}^{-}$, what is spin magnetic moment in elemental state?
1 2.87
2 5.5
3 5.9
4 4.9
Explanation:
(C) : When metal is present in +2 oxidation state then it contains $23 \mathrm{e}^{-}$ $\mathrm{M}^{2+}: 23 \mathrm{e}^{-}$ $\mathrm{M}: 25 \mathrm{e}^{-}$ Electronic configuration: $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{~s}^{2} 3 \mathrm{~d}^{5}$ Magnetic moment $(\mu)=\sqrt{\mathrm{n}(\mathrm{n}+2)}=\sqrt{5(5+2)}$ $=5.9 \text { B.M. }$
AIIMS-26 May
COORDINATION COMPOUNDS
274053
Which of the following complexes shows paramagnetic?
(C) : If complex compounds contains unpaired electron then it act as paramagnetic. (a) $\left[\mathrm{Zn}\left(\mathrm{NH}_{3}\right)_{3}\right]^{2+} \Rightarrow \mathrm{Zn}^{2+}: \mathrm{d}^{10}$ Number of unpaired electron $=10$ (b) $\mathrm{In}\left[\mathrm{PdCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, $\mathrm{Pd}$ is from $4^{\text {th }}$ period and it act as low spin complex and pairing of metal $\mathrm{d}$ electrons occurs. Number of unpaired electron $=0$ (c) In $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, Ni belongs to $3^{\text {rd }}$ period and $\mathrm{Cl}^{-}, \mathrm{PPh}_{3}$ belongs to weak field ligand so pairing of electron are not possible, $\mathrm{Ni}^{2+}: \mathrm{d}^{8}$ Number of unpaired electron $=2$ Hence, $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPH}_{3}\right)_{2}\right]$ complex shows paramagnetic behavior. (d) In $\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}$ Complex, ethylene diamine act as strong field ligand with $\mathrm{Co}^{3+}$ complex and pairing of metal d- electrons occurs. Number of unpaired electron $=0$
CG PET -2018
COORDINATION COMPOUNDS
274054
Assertion : In Zeise's salt, coordination no. of Pt is five. Reason: Ethene is bidentate ligand.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(D) : In Zeise's salt, $\left[\mathrm{PtCl}_{3}\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)\right]^{-}$coordination number of $\mathrm{Pt}$ is four. Ethene act as monodentate ligand. Hence, both Assertion and Reason are incorrect.
274051
Which ion has the least value of theoretical magnetic moment?
1 $\mathrm{Cr}^{3+}$
2 $\mathrm{Co}^{3+}$
3 $\mathrm{Ti}^{3+}$
4 $\mathrm{V}^{3+}$
Explanation:
(C) : (a) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ $=4.9 \text { B.M. }$ (b) Number of unpaired electron $=4$ Magnetic moment $=\sqrt{4(4+2)}=\sqrt{24}$ (c) Number of unpaired electron $=1$ Magnetic moment $=\sqrt{1(1+2)}=\sqrt{3}$ $=1.73 \text { B.M. }$ (d) Number of unpaired electron $=2$ Magnetic moment $=\sqrt{2(2+2)}=\sqrt{8}$ $=2.84 \text { B.M. }$ Hence, $\mathrm{Ti}^{3+}$ has least value theoretical magnetic moment.
GUJCET-2018
COORDINATION COMPOUNDS
274052
A gas metal in bivalent state has approximately $23 \mathrm{e}^{-}$, what is spin magnetic moment in elemental state?
1 2.87
2 5.5
3 5.9
4 4.9
Explanation:
(C) : When metal is present in +2 oxidation state then it contains $23 \mathrm{e}^{-}$ $\mathrm{M}^{2+}: 23 \mathrm{e}^{-}$ $\mathrm{M}: 25 \mathrm{e}^{-}$ Electronic configuration: $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{~s}^{2} 3 \mathrm{~d}^{5}$ Magnetic moment $(\mu)=\sqrt{\mathrm{n}(\mathrm{n}+2)}=\sqrt{5(5+2)}$ $=5.9 \text { B.M. }$
AIIMS-26 May
COORDINATION COMPOUNDS
274053
Which of the following complexes shows paramagnetic?
(C) : If complex compounds contains unpaired electron then it act as paramagnetic. (a) $\left[\mathrm{Zn}\left(\mathrm{NH}_{3}\right)_{3}\right]^{2+} \Rightarrow \mathrm{Zn}^{2+}: \mathrm{d}^{10}$ Number of unpaired electron $=10$ (b) $\mathrm{In}\left[\mathrm{PdCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, $\mathrm{Pd}$ is from $4^{\text {th }}$ period and it act as low spin complex and pairing of metal $\mathrm{d}$ electrons occurs. Number of unpaired electron $=0$ (c) In $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}\right]$ complex, Ni belongs to $3^{\text {rd }}$ period and $\mathrm{Cl}^{-}, \mathrm{PPh}_{3}$ belongs to weak field ligand so pairing of electron are not possible, $\mathrm{Ni}^{2+}: \mathrm{d}^{8}$ Number of unpaired electron $=2$ Hence, $\left[\mathrm{NiCl}_{2}\left(\mathrm{PPH}_{3}\right)_{2}\right]$ complex shows paramagnetic behavior. (d) In $\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}$ Complex, ethylene diamine act as strong field ligand with $\mathrm{Co}^{3+}$ complex and pairing of metal d- electrons occurs. Number of unpaired electron $=0$
CG PET -2018
COORDINATION COMPOUNDS
274054
Assertion : In Zeise's salt, coordination no. of Pt is five. Reason: Ethene is bidentate ligand.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(D) : In Zeise's salt, $\left[\mathrm{PtCl}_{3}\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)\right]^{-}$coordination number of $\mathrm{Pt}$ is four. Ethene act as monodentate ligand. Hence, both Assertion and Reason are incorrect.
