(B) : Let the oxidation state of $\mathrm{Pt}$ is $\mathrm{x}$. ${\left[\mathrm{Pt}(\mathrm{py})_{4}\right]\left[\mathrm{PtCl}_{4}\right]}$ $\mathrm{x}+4 \times 0+\mathrm{x}+(-1) \times 4=0$ $2 \mathrm{x}=4$ $\mathrm{x}=+2$ Thus, it is the complex in which the central metal atom, $\mathrm{Pt}$ in cationic and anionic parts has same oxidation state.
JCECE - 2015
COORDINATION COMPOUNDS
274347
The sum of coordination number and oxidation number of the metal $M$ in the complex $\left[\mathrm{M}(\mathrm{en})_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ (where en is ethylenediamine) is
1 6
2 7
3 8
4 9
Explanation:
(D) : $\left[\mathrm{M}(\text { en })_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{M}$. $\therefore \mathrm{x}+2(0)+1(-2)-1=0$ $\mathrm{x}=3$ The co-ordination number of the compound is 6 . Hence, the sum of co-ordination number and oxidation of the metal $\mathrm{M}$ is $6+3=9$.
NEET-2015
COORDINATION COMPOUNDS
274348
The oxidation state and covalency of $\mathrm{Al}$ in [Al $\left.\mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : Given, $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let the O.S. of $\mathrm{Al}$ is $\mathrm{x}$. $\therefore \quad \mathrm{x}+(-1)+5 \times 0=+2$ $\mathrm{x}=+3$ Covalency of $\mathrm{Cl}=1$ and $\mathrm{H}_{2} \mathrm{O}=5$ $\therefore$ Total covalency $=1+5=6$
AP EAMCET (Engg.) - 2014
COORDINATION COMPOUNDS
274350
The oxidation state and effective Atomic Number (EAN) of cobalt in $\left[\mathrm{CoF}_{6}\right]^{2-}$ are respectively
1 3 and 36
2 4 and 35
3 4 and 37
4 2 and 35
Explanation:
(B) : $\left[\mathrm{CoF}_{6}\right]^{2-}$ O.S. of $\mathrm{Co} \Rightarrow \mathrm{x}+6(-1)=-2$ $\Rightarrow \quad \mathrm{x}=+4$ $\mathrm{EAN}=$ Atomic number - oxidation state +2 C.N $=27-4+2 \times 6$ $=35$
MPPET-2008
COORDINATION COMPOUNDS
274352
The oxidation state and covalency of $\mathrm{Al}$ in $\left[\mathrm{AlCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{Al}$. $\mathrm{x}+1(-1)+5(0)=+2$ $\mathrm{x}=+3$ The oxidation state of $\mathrm{Al}$ is +3 . The covalency of $\mathrm{Al}$ is $+6$
(B) : Let the oxidation state of $\mathrm{Pt}$ is $\mathrm{x}$. ${\left[\mathrm{Pt}(\mathrm{py})_{4}\right]\left[\mathrm{PtCl}_{4}\right]}$ $\mathrm{x}+4 \times 0+\mathrm{x}+(-1) \times 4=0$ $2 \mathrm{x}=4$ $\mathrm{x}=+2$ Thus, it is the complex in which the central metal atom, $\mathrm{Pt}$ in cationic and anionic parts has same oxidation state.
JCECE - 2015
COORDINATION COMPOUNDS
274347
The sum of coordination number and oxidation number of the metal $M$ in the complex $\left[\mathrm{M}(\mathrm{en})_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ (where en is ethylenediamine) is
1 6
2 7
3 8
4 9
Explanation:
(D) : $\left[\mathrm{M}(\text { en })_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{M}$. $\therefore \mathrm{x}+2(0)+1(-2)-1=0$ $\mathrm{x}=3$ The co-ordination number of the compound is 6 . Hence, the sum of co-ordination number and oxidation of the metal $\mathrm{M}$ is $6+3=9$.
NEET-2015
COORDINATION COMPOUNDS
274348
The oxidation state and covalency of $\mathrm{Al}$ in [Al $\left.\mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : Given, $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let the O.S. of $\mathrm{Al}$ is $\mathrm{x}$. $\therefore \quad \mathrm{x}+(-1)+5 \times 0=+2$ $\mathrm{x}=+3$ Covalency of $\mathrm{Cl}=1$ and $\mathrm{H}_{2} \mathrm{O}=5$ $\therefore$ Total covalency $=1+5=6$
AP EAMCET (Engg.) - 2014
COORDINATION COMPOUNDS
274350
The oxidation state and effective Atomic Number (EAN) of cobalt in $\left[\mathrm{CoF}_{6}\right]^{2-}$ are respectively
1 3 and 36
2 4 and 35
3 4 and 37
4 2 and 35
Explanation:
(B) : $\left[\mathrm{CoF}_{6}\right]^{2-}$ O.S. of $\mathrm{Co} \Rightarrow \mathrm{x}+6(-1)=-2$ $\Rightarrow \quad \mathrm{x}=+4$ $\mathrm{EAN}=$ Atomic number - oxidation state +2 C.N $=27-4+2 \times 6$ $=35$
MPPET-2008
COORDINATION COMPOUNDS
274352
The oxidation state and covalency of $\mathrm{Al}$ in $\left[\mathrm{AlCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{Al}$. $\mathrm{x}+1(-1)+5(0)=+2$ $\mathrm{x}=+3$ The oxidation state of $\mathrm{Al}$ is +3 . The covalency of $\mathrm{Al}$ is $+6$
(B) : Let the oxidation state of $\mathrm{Pt}$ is $\mathrm{x}$. ${\left[\mathrm{Pt}(\mathrm{py})_{4}\right]\left[\mathrm{PtCl}_{4}\right]}$ $\mathrm{x}+4 \times 0+\mathrm{x}+(-1) \times 4=0$ $2 \mathrm{x}=4$ $\mathrm{x}=+2$ Thus, it is the complex in which the central metal atom, $\mathrm{Pt}$ in cationic and anionic parts has same oxidation state.
JCECE - 2015
COORDINATION COMPOUNDS
274347
The sum of coordination number and oxidation number of the metal $M$ in the complex $\left[\mathrm{M}(\mathrm{en})_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ (where en is ethylenediamine) is
1 6
2 7
3 8
4 9
Explanation:
(D) : $\left[\mathrm{M}(\text { en })_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{M}$. $\therefore \mathrm{x}+2(0)+1(-2)-1=0$ $\mathrm{x}=3$ The co-ordination number of the compound is 6 . Hence, the sum of co-ordination number and oxidation of the metal $\mathrm{M}$ is $6+3=9$.
NEET-2015
COORDINATION COMPOUNDS
274348
The oxidation state and covalency of $\mathrm{Al}$ in [Al $\left.\mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : Given, $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let the O.S. of $\mathrm{Al}$ is $\mathrm{x}$. $\therefore \quad \mathrm{x}+(-1)+5 \times 0=+2$ $\mathrm{x}=+3$ Covalency of $\mathrm{Cl}=1$ and $\mathrm{H}_{2} \mathrm{O}=5$ $\therefore$ Total covalency $=1+5=6$
AP EAMCET (Engg.) - 2014
COORDINATION COMPOUNDS
274350
The oxidation state and effective Atomic Number (EAN) of cobalt in $\left[\mathrm{CoF}_{6}\right]^{2-}$ are respectively
1 3 and 36
2 4 and 35
3 4 and 37
4 2 and 35
Explanation:
(B) : $\left[\mathrm{CoF}_{6}\right]^{2-}$ O.S. of $\mathrm{Co} \Rightarrow \mathrm{x}+6(-1)=-2$ $\Rightarrow \quad \mathrm{x}=+4$ $\mathrm{EAN}=$ Atomic number - oxidation state +2 C.N $=27-4+2 \times 6$ $=35$
MPPET-2008
COORDINATION COMPOUNDS
274352
The oxidation state and covalency of $\mathrm{Al}$ in $\left[\mathrm{AlCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{Al}$. $\mathrm{x}+1(-1)+5(0)=+2$ $\mathrm{x}=+3$ The oxidation state of $\mathrm{Al}$ is +3 . The covalency of $\mathrm{Al}$ is $+6$
(B) : Let the oxidation state of $\mathrm{Pt}$ is $\mathrm{x}$. ${\left[\mathrm{Pt}(\mathrm{py})_{4}\right]\left[\mathrm{PtCl}_{4}\right]}$ $\mathrm{x}+4 \times 0+\mathrm{x}+(-1) \times 4=0$ $2 \mathrm{x}=4$ $\mathrm{x}=+2$ Thus, it is the complex in which the central metal atom, $\mathrm{Pt}$ in cationic and anionic parts has same oxidation state.
JCECE - 2015
COORDINATION COMPOUNDS
274347
The sum of coordination number and oxidation number of the metal $M$ in the complex $\left[\mathrm{M}(\mathrm{en})_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ (where en is ethylenediamine) is
1 6
2 7
3 8
4 9
Explanation:
(D) : $\left[\mathrm{M}(\text { en })_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{M}$. $\therefore \mathrm{x}+2(0)+1(-2)-1=0$ $\mathrm{x}=3$ The co-ordination number of the compound is 6 . Hence, the sum of co-ordination number and oxidation of the metal $\mathrm{M}$ is $6+3=9$.
NEET-2015
COORDINATION COMPOUNDS
274348
The oxidation state and covalency of $\mathrm{Al}$ in [Al $\left.\mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : Given, $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let the O.S. of $\mathrm{Al}$ is $\mathrm{x}$. $\therefore \quad \mathrm{x}+(-1)+5 \times 0=+2$ $\mathrm{x}=+3$ Covalency of $\mathrm{Cl}=1$ and $\mathrm{H}_{2} \mathrm{O}=5$ $\therefore$ Total covalency $=1+5=6$
AP EAMCET (Engg.) - 2014
COORDINATION COMPOUNDS
274350
The oxidation state and effective Atomic Number (EAN) of cobalt in $\left[\mathrm{CoF}_{6}\right]^{2-}$ are respectively
1 3 and 36
2 4 and 35
3 4 and 37
4 2 and 35
Explanation:
(B) : $\left[\mathrm{CoF}_{6}\right]^{2-}$ O.S. of $\mathrm{Co} \Rightarrow \mathrm{x}+6(-1)=-2$ $\Rightarrow \quad \mathrm{x}=+4$ $\mathrm{EAN}=$ Atomic number - oxidation state +2 C.N $=27-4+2 \times 6$ $=35$
MPPET-2008
COORDINATION COMPOUNDS
274352
The oxidation state and covalency of $\mathrm{Al}$ in $\left[\mathrm{AlCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{Al}$. $\mathrm{x}+1(-1)+5(0)=+2$ $\mathrm{x}=+3$ The oxidation state of $\mathrm{Al}$ is +3 . The covalency of $\mathrm{Al}$ is $+6$
(B) : Let the oxidation state of $\mathrm{Pt}$ is $\mathrm{x}$. ${\left[\mathrm{Pt}(\mathrm{py})_{4}\right]\left[\mathrm{PtCl}_{4}\right]}$ $\mathrm{x}+4 \times 0+\mathrm{x}+(-1) \times 4=0$ $2 \mathrm{x}=4$ $\mathrm{x}=+2$ Thus, it is the complex in which the central metal atom, $\mathrm{Pt}$ in cationic and anionic parts has same oxidation state.
JCECE - 2015
COORDINATION COMPOUNDS
274347
The sum of coordination number and oxidation number of the metal $M$ in the complex $\left[\mathrm{M}(\mathrm{en})_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ (where en is ethylenediamine) is
1 6
2 7
3 8
4 9
Explanation:
(D) : $\left[\mathrm{M}(\text { en })_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right] \mathrm{Cl}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{M}$. $\therefore \mathrm{x}+2(0)+1(-2)-1=0$ $\mathrm{x}=3$ The co-ordination number of the compound is 6 . Hence, the sum of co-ordination number and oxidation of the metal $\mathrm{M}$ is $6+3=9$.
NEET-2015
COORDINATION COMPOUNDS
274348
The oxidation state and covalency of $\mathrm{Al}$ in [Al $\left.\mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : Given, $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let the O.S. of $\mathrm{Al}$ is $\mathrm{x}$. $\therefore \quad \mathrm{x}+(-1)+5 \times 0=+2$ $\mathrm{x}=+3$ Covalency of $\mathrm{Cl}=1$ and $\mathrm{H}_{2} \mathrm{O}=5$ $\therefore$ Total covalency $=1+5=6$
AP EAMCET (Engg.) - 2014
COORDINATION COMPOUNDS
274350
The oxidation state and effective Atomic Number (EAN) of cobalt in $\left[\mathrm{CoF}_{6}\right]^{2-}$ are respectively
1 3 and 36
2 4 and 35
3 4 and 37
4 2 and 35
Explanation:
(B) : $\left[\mathrm{CoF}_{6}\right]^{2-}$ O.S. of $\mathrm{Co} \Rightarrow \mathrm{x}+6(-1)=-2$ $\Rightarrow \quad \mathrm{x}=+4$ $\mathrm{EAN}=$ Atomic number - oxidation state +2 C.N $=27-4+2 \times 6$ $=35$
MPPET-2008
COORDINATION COMPOUNDS
274352
The oxidation state and covalency of $\mathrm{Al}$ in $\left[\mathrm{AlCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ are respectively
1 $+6,6$
2 $+3,6$
3 $+2,6$
4 $+3,3$
Explanation:
(B) : $\left[\mathrm{Al} \mathrm{Cl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{2+}$ Let, $\mathrm{x}$ be the oxidation state of $\mathrm{Al}$. $\mathrm{x}+1(-1)+5(0)=+2$ $\mathrm{x}=+3$ The oxidation state of $\mathrm{Al}$ is +3 . The covalency of $\mathrm{Al}$ is $+6$
