322108
On the basis of sidgwick EAN rule, which of the following statement is not correct?
1 \(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) can act as reducing agent.
2 \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) can act as oxidising agent.
3 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) can act as both oxidising agent and reducing agent.
4 \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) show dimerisation to gain stability.
Explanation:
\(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) EAN of \({\text{Mn = 25 - 0 + 12 = 37}}\) To gain stability it has to loose an \({\text{e}}\,{\text{ - hence}}\), it can act as reducing agent. \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) EAN of \(\mathrm{V}=23-0+12=35\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=26-0+10=36\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=25-0+10=35\) It follows EAN rule. It does not behave as oxidising agent and reducing agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) can dimerise \(\left[\mathrm{Mn}_{2}(\mathrm{CO})_{10}\right]\) to gain stability.
CHXII09:COORDINATION COMPOUNDS
322109
The atomic number of cobalt is 27 . The EAN of cobalt in \(\mathrm{Na}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]\) is
1 35
2 24
3 36
4 34
Explanation:
EAN of \(\mathrm{Co}\) in \(\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]^{3-}\) \(=\) Atomic number of metal atom - Oxidation state \(+(2 \times\) Number of monodentate ligands \()\) \(=27-3+(2 \times 26)=36\)
KCET - 2012
CHXII09:COORDINATION COMPOUNDS
322110
The EAN of platinum in potassium hexachloroplatinate (IV) is:
1 86
2 46
3 36
4 84
Explanation:
\(\mathrm{EAN}=78-4+2 \times 6=86\)
CHXII09:COORDINATION COMPOUNDS
322111
The effective atomic number of \(\operatorname{Iron}(Z=26)\) in \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{-3}\) is
1 36
2 33
3 35
4 34
Explanation:
In the given complex ion \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\), the \(\mathrm{Fe}\) is in +3 oxidation state. As we know that atomic number of iron is 26 . The number of electron in \(\mathrm{Fe}^{3+}\) is 23 . Each of the six cyanide molecules donates a pair of electrons so that EAN becomes \(23+2 \times 6 \Rightarrow 35\).
322108
On the basis of sidgwick EAN rule, which of the following statement is not correct?
1 \(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) can act as reducing agent.
2 \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) can act as oxidising agent.
3 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) can act as both oxidising agent and reducing agent.
4 \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) show dimerisation to gain stability.
Explanation:
\(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) EAN of \({\text{Mn = 25 - 0 + 12 = 37}}\) To gain stability it has to loose an \({\text{e}}\,{\text{ - hence}}\), it can act as reducing agent. \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) EAN of \(\mathrm{V}=23-0+12=35\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=26-0+10=36\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=25-0+10=35\) It follows EAN rule. It does not behave as oxidising agent and reducing agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) can dimerise \(\left[\mathrm{Mn}_{2}(\mathrm{CO})_{10}\right]\) to gain stability.
CHXII09:COORDINATION COMPOUNDS
322109
The atomic number of cobalt is 27 . The EAN of cobalt in \(\mathrm{Na}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]\) is
1 35
2 24
3 36
4 34
Explanation:
EAN of \(\mathrm{Co}\) in \(\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]^{3-}\) \(=\) Atomic number of metal atom - Oxidation state \(+(2 \times\) Number of monodentate ligands \()\) \(=27-3+(2 \times 26)=36\)
KCET - 2012
CHXII09:COORDINATION COMPOUNDS
322110
The EAN of platinum in potassium hexachloroplatinate (IV) is:
1 86
2 46
3 36
4 84
Explanation:
\(\mathrm{EAN}=78-4+2 \times 6=86\)
CHXII09:COORDINATION COMPOUNDS
322111
The effective atomic number of \(\operatorname{Iron}(Z=26)\) in \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{-3}\) is
1 36
2 33
3 35
4 34
Explanation:
In the given complex ion \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\), the \(\mathrm{Fe}\) is in +3 oxidation state. As we know that atomic number of iron is 26 . The number of electron in \(\mathrm{Fe}^{3+}\) is 23 . Each of the six cyanide molecules donates a pair of electrons so that EAN becomes \(23+2 \times 6 \Rightarrow 35\).
322108
On the basis of sidgwick EAN rule, which of the following statement is not correct?
1 \(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) can act as reducing agent.
2 \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) can act as oxidising agent.
3 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) can act as both oxidising agent and reducing agent.
4 \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) show dimerisation to gain stability.
Explanation:
\(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) EAN of \({\text{Mn = 25 - 0 + 12 = 37}}\) To gain stability it has to loose an \({\text{e}}\,{\text{ - hence}}\), it can act as reducing agent. \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) EAN of \(\mathrm{V}=23-0+12=35\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=26-0+10=36\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=25-0+10=35\) It follows EAN rule. It does not behave as oxidising agent and reducing agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) can dimerise \(\left[\mathrm{Mn}_{2}(\mathrm{CO})_{10}\right]\) to gain stability.
CHXII09:COORDINATION COMPOUNDS
322109
The atomic number of cobalt is 27 . The EAN of cobalt in \(\mathrm{Na}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]\) is
1 35
2 24
3 36
4 34
Explanation:
EAN of \(\mathrm{Co}\) in \(\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]^{3-}\) \(=\) Atomic number of metal atom - Oxidation state \(+(2 \times\) Number of monodentate ligands \()\) \(=27-3+(2 \times 26)=36\)
KCET - 2012
CHXII09:COORDINATION COMPOUNDS
322110
The EAN of platinum in potassium hexachloroplatinate (IV) is:
1 86
2 46
3 36
4 84
Explanation:
\(\mathrm{EAN}=78-4+2 \times 6=86\)
CHXII09:COORDINATION COMPOUNDS
322111
The effective atomic number of \(\operatorname{Iron}(Z=26)\) in \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{-3}\) is
1 36
2 33
3 35
4 34
Explanation:
In the given complex ion \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\), the \(\mathrm{Fe}\) is in +3 oxidation state. As we know that atomic number of iron is 26 . The number of electron in \(\mathrm{Fe}^{3+}\) is 23 . Each of the six cyanide molecules donates a pair of electrons so that EAN becomes \(23+2 \times 6 \Rightarrow 35\).
322108
On the basis of sidgwick EAN rule, which of the following statement is not correct?
1 \(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) can act as reducing agent.
2 \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) can act as oxidising agent.
3 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) can act as both oxidising agent and reducing agent.
4 \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) show dimerisation to gain stability.
Explanation:
\(\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]\) EAN of \({\text{Mn = 25 - 0 + 12 = 37}}\) To gain stability it has to loose an \({\text{e}}\,{\text{ - hence}}\), it can act as reducing agent. \(\left[\mathrm{V}(\mathrm{CO})_{6}\right]\) EAN of \(\mathrm{V}=23-0+12=35\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=26-0+10=36\) To gain stability it has to gain an e-hence, it can act as oxidising agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) EAN of \(\mathrm{Fe}=25-0+10=35\) It follows EAN rule. It does not behave as oxidising agent and reducing agent. \(\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]\) can dimerise \(\left[\mathrm{Mn}_{2}(\mathrm{CO})_{10}\right]\) to gain stability.
CHXII09:COORDINATION COMPOUNDS
322109
The atomic number of cobalt is 27 . The EAN of cobalt in \(\mathrm{Na}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]\) is
1 35
2 24
3 36
4 34
Explanation:
EAN of \(\mathrm{Co}\) in \(\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{4} \mathrm{Cl}_{2}\right]^{3-}\) \(=\) Atomic number of metal atom - Oxidation state \(+(2 \times\) Number of monodentate ligands \()\) \(=27-3+(2 \times 26)=36\)
KCET - 2012
CHXII09:COORDINATION COMPOUNDS
322110
The EAN of platinum in potassium hexachloroplatinate (IV) is:
1 86
2 46
3 36
4 84
Explanation:
\(\mathrm{EAN}=78-4+2 \times 6=86\)
CHXII09:COORDINATION COMPOUNDS
322111
The effective atomic number of \(\operatorname{Iron}(Z=26)\) in \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{-3}\) is
1 36
2 33
3 35
4 34
Explanation:
In the given complex ion \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\), the \(\mathrm{Fe}\) is in +3 oxidation state. As we know that atomic number of iron is 26 . The number of electron in \(\mathrm{Fe}^{3+}\) is 23 . Each of the six cyanide molecules donates a pair of electrons so that EAN becomes \(23+2 \times 6 \Rightarrow 35\).
