321491
Which one of the following species is paramagnetic in nature?
1 \(\mathrm{V}^{4+}\)
2 \(\mathrm{Sc}^{3+}\)
3 \(\mathrm{V}^{5+}\)
4 \(\mathrm{Zn}^{2+}\)
Explanation:
The number of unpaired electrons and electronic configuration of the given species is shown below : (1) \({{\rm{V}}^{{\rm{4 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{1}}}\) No. of unpaired electron \(=1\) (2) \({\rm{S}}{{\rm{c}}^{{\rm{3 + }}}}{\rm{[Z = 21] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (3) \({{\rm{V}}^{{\rm{5 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (4)\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{[Z = 30] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{{\rm{10}}}}\) No. of unpaired electron \(=0\) \(\therefore\) The correct option is (1).
CHXII08:THE D- & F-BLOCK ELEMENTS
321492
What is the value of spin only magnetic moment of \(\mathrm{Ni}(\mathrm{Z}=28)\) in +2 oxidation state?
1 \(3.9 \mathrm{BM}\)
2 \(0.0 \mathrm{BM}\)
3 \(2.8 \mathrm{BM}\)
4 \(1.7 \mathrm{BM}\)
Explanation:
\({\text{N}}{{\text{i}}^{{\text{2 + }}}}{\text{(Z = 28)}} \Rightarrow {\text{1}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{s}}^{\text{2}}}{\text{3}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{d}}^{\text{8}}}\) \(\therefore\) It has 2 unpaired electrons, (in \(3 \mathrm{~d}\) orbitals) \(\mu=\sqrt{\mathrm{n}(\mathrm{n}+2)}\) \(=\sqrt{2(2+2)}=2.8 \mathrm{BM}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321493
Identify ferromagnetic element from the following
1 Iron
2 Vanadium
3 Chromium
4 Manganese
Explanation:
Among transition metals \(\mathrm{Fe}, \mathrm{Co}, \mathrm{Ni}\) are Ferromagnetic.
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321494
The magnetic moment of a divalent ion in B.M. units in aqueous solution if its atomic number is 25 is
1 5.92
2 5.47
3 6.92
4 Zero
Explanation:
With atomic number 25 , the divalent ion in aqueous solution will have \(\mathrm{\mathrm{d}^{5}}\) configuration (five unpaired electrons). The magnetic moment, \(\mathrm{\mu}\) is \({\rm{\mu = }}\sqrt {{\rm{5(5 + 2)}}} {\rm{ = 5}}{\rm{.92}}{\mkern 1mu} {\mkern 1mu} \,{\rm{BM}}{\rm{.}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321495
Magnetic moment of \(\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) is
321491
Which one of the following species is paramagnetic in nature?
1 \(\mathrm{V}^{4+}\)
2 \(\mathrm{Sc}^{3+}\)
3 \(\mathrm{V}^{5+}\)
4 \(\mathrm{Zn}^{2+}\)
Explanation:
The number of unpaired electrons and electronic configuration of the given species is shown below : (1) \({{\rm{V}}^{{\rm{4 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{1}}}\) No. of unpaired electron \(=1\) (2) \({\rm{S}}{{\rm{c}}^{{\rm{3 + }}}}{\rm{[Z = 21] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (3) \({{\rm{V}}^{{\rm{5 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (4)\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{[Z = 30] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{{\rm{10}}}}\) No. of unpaired electron \(=0\) \(\therefore\) The correct option is (1).
CHXII08:THE D- & F-BLOCK ELEMENTS
321492
What is the value of spin only magnetic moment of \(\mathrm{Ni}(\mathrm{Z}=28)\) in +2 oxidation state?
1 \(3.9 \mathrm{BM}\)
2 \(0.0 \mathrm{BM}\)
3 \(2.8 \mathrm{BM}\)
4 \(1.7 \mathrm{BM}\)
Explanation:
\({\text{N}}{{\text{i}}^{{\text{2 + }}}}{\text{(Z = 28)}} \Rightarrow {\text{1}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{s}}^{\text{2}}}{\text{3}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{d}}^{\text{8}}}\) \(\therefore\) It has 2 unpaired electrons, (in \(3 \mathrm{~d}\) orbitals) \(\mu=\sqrt{\mathrm{n}(\mathrm{n}+2)}\) \(=\sqrt{2(2+2)}=2.8 \mathrm{BM}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321493
Identify ferromagnetic element from the following
1 Iron
2 Vanadium
3 Chromium
4 Manganese
Explanation:
Among transition metals \(\mathrm{Fe}, \mathrm{Co}, \mathrm{Ni}\) are Ferromagnetic.
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321494
The magnetic moment of a divalent ion in B.M. units in aqueous solution if its atomic number is 25 is
1 5.92
2 5.47
3 6.92
4 Zero
Explanation:
With atomic number 25 , the divalent ion in aqueous solution will have \(\mathrm{\mathrm{d}^{5}}\) configuration (five unpaired electrons). The magnetic moment, \(\mathrm{\mu}\) is \({\rm{\mu = }}\sqrt {{\rm{5(5 + 2)}}} {\rm{ = 5}}{\rm{.92}}{\mkern 1mu} {\mkern 1mu} \,{\rm{BM}}{\rm{.}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321495
Magnetic moment of \(\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) is
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII08:THE D- & F-BLOCK ELEMENTS
321491
Which one of the following species is paramagnetic in nature?
1 \(\mathrm{V}^{4+}\)
2 \(\mathrm{Sc}^{3+}\)
3 \(\mathrm{V}^{5+}\)
4 \(\mathrm{Zn}^{2+}\)
Explanation:
The number of unpaired electrons and electronic configuration of the given species is shown below : (1) \({{\rm{V}}^{{\rm{4 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{1}}}\) No. of unpaired electron \(=1\) (2) \({\rm{S}}{{\rm{c}}^{{\rm{3 + }}}}{\rm{[Z = 21] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (3) \({{\rm{V}}^{{\rm{5 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (4)\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{[Z = 30] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{{\rm{10}}}}\) No. of unpaired electron \(=0\) \(\therefore\) The correct option is (1).
CHXII08:THE D- & F-BLOCK ELEMENTS
321492
What is the value of spin only magnetic moment of \(\mathrm{Ni}(\mathrm{Z}=28)\) in +2 oxidation state?
1 \(3.9 \mathrm{BM}\)
2 \(0.0 \mathrm{BM}\)
3 \(2.8 \mathrm{BM}\)
4 \(1.7 \mathrm{BM}\)
Explanation:
\({\text{N}}{{\text{i}}^{{\text{2 + }}}}{\text{(Z = 28)}} \Rightarrow {\text{1}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{s}}^{\text{2}}}{\text{3}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{d}}^{\text{8}}}\) \(\therefore\) It has 2 unpaired electrons, (in \(3 \mathrm{~d}\) orbitals) \(\mu=\sqrt{\mathrm{n}(\mathrm{n}+2)}\) \(=\sqrt{2(2+2)}=2.8 \mathrm{BM}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321493
Identify ferromagnetic element from the following
1 Iron
2 Vanadium
3 Chromium
4 Manganese
Explanation:
Among transition metals \(\mathrm{Fe}, \mathrm{Co}, \mathrm{Ni}\) are Ferromagnetic.
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321494
The magnetic moment of a divalent ion in B.M. units in aqueous solution if its atomic number is 25 is
1 5.92
2 5.47
3 6.92
4 Zero
Explanation:
With atomic number 25 , the divalent ion in aqueous solution will have \(\mathrm{\mathrm{d}^{5}}\) configuration (five unpaired electrons). The magnetic moment, \(\mathrm{\mu}\) is \({\rm{\mu = }}\sqrt {{\rm{5(5 + 2)}}} {\rm{ = 5}}{\rm{.92}}{\mkern 1mu} {\mkern 1mu} \,{\rm{BM}}{\rm{.}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321495
Magnetic moment of \(\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) is
321491
Which one of the following species is paramagnetic in nature?
1 \(\mathrm{V}^{4+}\)
2 \(\mathrm{Sc}^{3+}\)
3 \(\mathrm{V}^{5+}\)
4 \(\mathrm{Zn}^{2+}\)
Explanation:
The number of unpaired electrons and electronic configuration of the given species is shown below : (1) \({{\rm{V}}^{{\rm{4 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{1}}}\) No. of unpaired electron \(=1\) (2) \({\rm{S}}{{\rm{c}}^{{\rm{3 + }}}}{\rm{[Z = 21] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (3) \({{\rm{V}}^{{\rm{5 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (4)\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{[Z = 30] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{{\rm{10}}}}\) No. of unpaired electron \(=0\) \(\therefore\) The correct option is (1).
CHXII08:THE D- & F-BLOCK ELEMENTS
321492
What is the value of spin only magnetic moment of \(\mathrm{Ni}(\mathrm{Z}=28)\) in +2 oxidation state?
1 \(3.9 \mathrm{BM}\)
2 \(0.0 \mathrm{BM}\)
3 \(2.8 \mathrm{BM}\)
4 \(1.7 \mathrm{BM}\)
Explanation:
\({\text{N}}{{\text{i}}^{{\text{2 + }}}}{\text{(Z = 28)}} \Rightarrow {\text{1}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{s}}^{\text{2}}}{\text{3}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{d}}^{\text{8}}}\) \(\therefore\) It has 2 unpaired electrons, (in \(3 \mathrm{~d}\) orbitals) \(\mu=\sqrt{\mathrm{n}(\mathrm{n}+2)}\) \(=\sqrt{2(2+2)}=2.8 \mathrm{BM}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321493
Identify ferromagnetic element from the following
1 Iron
2 Vanadium
3 Chromium
4 Manganese
Explanation:
Among transition metals \(\mathrm{Fe}, \mathrm{Co}, \mathrm{Ni}\) are Ferromagnetic.
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321494
The magnetic moment of a divalent ion in B.M. units in aqueous solution if its atomic number is 25 is
1 5.92
2 5.47
3 6.92
4 Zero
Explanation:
With atomic number 25 , the divalent ion in aqueous solution will have \(\mathrm{\mathrm{d}^{5}}\) configuration (five unpaired electrons). The magnetic moment, \(\mathrm{\mu}\) is \({\rm{\mu = }}\sqrt {{\rm{5(5 + 2)}}} {\rm{ = 5}}{\rm{.92}}{\mkern 1mu} {\mkern 1mu} \,{\rm{BM}}{\rm{.}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321495
Magnetic moment of \(\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) is
321491
Which one of the following species is paramagnetic in nature?
1 \(\mathrm{V}^{4+}\)
2 \(\mathrm{Sc}^{3+}\)
3 \(\mathrm{V}^{5+}\)
4 \(\mathrm{Zn}^{2+}\)
Explanation:
The number of unpaired electrons and electronic configuration of the given species is shown below : (1) \({{\rm{V}}^{{\rm{4 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{1}}}\) No. of unpaired electron \(=1\) (2) \({\rm{S}}{{\rm{c}}^{{\rm{3 + }}}}{\rm{[Z = 21] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (3) \({{\rm{V}}^{{\rm{5 + }}}}{\rm{[Z = 23] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{\rm{0}}}\) No. of unpaired electron \(=0\) (4)\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{[Z = 30] = [Ar}}{{\rm{]}}_{{\rm{18}}}}{\rm{3}}{{\rm{d}}^{{\rm{10}}}}\) No. of unpaired electron \(=0\) \(\therefore\) The correct option is (1).
CHXII08:THE D- & F-BLOCK ELEMENTS
321492
What is the value of spin only magnetic moment of \(\mathrm{Ni}(\mathrm{Z}=28)\) in +2 oxidation state?
1 \(3.9 \mathrm{BM}\)
2 \(0.0 \mathrm{BM}\)
3 \(2.8 \mathrm{BM}\)
4 \(1.7 \mathrm{BM}\)
Explanation:
\({\text{N}}{{\text{i}}^{{\text{2 + }}}}{\text{(Z = 28)}} \Rightarrow {\text{1}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{s}}^{\text{2}}}{\text{2}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{s}}^{\text{2}}}{\text{3}}{{\text{p}}^{\text{6}}}{\text{3}}{{\text{d}}^{\text{8}}}\) \(\therefore\) It has 2 unpaired electrons, (in \(3 \mathrm{~d}\) orbitals) \(\mu=\sqrt{\mathrm{n}(\mathrm{n}+2)}\) \(=\sqrt{2(2+2)}=2.8 \mathrm{BM}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321493
Identify ferromagnetic element from the following
1 Iron
2 Vanadium
3 Chromium
4 Manganese
Explanation:
Among transition metals \(\mathrm{Fe}, \mathrm{Co}, \mathrm{Ni}\) are Ferromagnetic.
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS
321494
The magnetic moment of a divalent ion in B.M. units in aqueous solution if its atomic number is 25 is
1 5.92
2 5.47
3 6.92
4 Zero
Explanation:
With atomic number 25 , the divalent ion in aqueous solution will have \(\mathrm{\mathrm{d}^{5}}\) configuration (five unpaired electrons). The magnetic moment, \(\mathrm{\mu}\) is \({\rm{\mu = }}\sqrt {{\rm{5(5 + 2)}}} {\rm{ = 5}}{\rm{.92}}{\mkern 1mu} {\mkern 1mu} \,{\rm{BM}}{\rm{.}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321495
Magnetic moment of \(\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) is