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CHXII09:COORDINATION COMPOUNDS

322104 What is the oxidation state of cobalt in a coordination complex if it's EAN is 36 and the value of C.N. is 6 (Given : Atomic number of cobalt $= 27$ ).

1 +4

2 +2

3 +1

4 +3

Explanation:

$EAN = Z -$ oxdn.state $+ (2 \times$ coordn.no $)$
$36 = 27 -$ oxdn.state $+ (2 \times 6)$
$36 = 27 -$ oxdn. state +12
$∴$ oxdn.state $= 27 + 12 - 36 = + 3$

MHTCET - 2021

CHXII09:COORDINATION COMPOUNDS

322105 What is the EAN of central metal in $[Ni (gly)_{2}]$ ?

1 30

2 34

3 36

4 32

Explanation:

$EAN = 28 - 2 + 8 = 34$ .

CHXII09:COORDINATION COMPOUNDS

322106 In which of the following coordinate compounds the central metal atom obeys the EAN rule?

K_{3} [Fe (CN)_{6}]

K_{4} [Fe (CN)_{6}]

[Cu {({NH}_{3})}_{4}] {SO}_{4}

4 All the above

Explanation:

$K_{4} [Fe (CN)_{6}]$ obeys the EAN rule.
$EAN = 26 - 2 + 2 \times 6 = 36$

CHXII09:COORDINATION COMPOUNDS

322107 What is effective atomic number of cobalt in ${[Co {({NH}_{3})}_{6}]}^{3 +} [Co (Z = 27)]$ ?

1 30

2 33

3 27

4 36

Explanation:

${[Co {({NH}_{3})}_{6}]}^{3 +} \Rightarrow Z = 27$
$EAN =$ atomic no - oxdn state $+ (2 \times$ co ordn.no $)$
EAN of ${Co}^{3 +} \Rightarrow 27 - 3 + 2 (6) = 36$

MHTCET - 2021

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CHXII09:COORDINATION COMPOUNDS

322104 What is the oxidation state of cobalt in a coordination complex if it's EAN is 36 and the value of C.N. is 6 (Given : Atomic number of cobalt $= 27$ ).

1 +4

2 +2

3 +1

4 +3

Explanation:

$EAN = Z -$ oxdn.state $+ (2 \times$ coordn.no $)$
$36 = 27 -$ oxdn.state $+ (2 \times 6)$
$36 = 27 -$ oxdn. state +12
$∴$ oxdn.state $= 27 + 12 - 36 = + 3$

MHTCET - 2021

CHXII09:COORDINATION COMPOUNDS

322105 What is the EAN of central metal in $[Ni (gly)_{2}]$ ?

1 30

2 34

3 36

4 32

Explanation:

$EAN = 28 - 2 + 8 = 34$ .

CHXII09:COORDINATION COMPOUNDS

322106 In which of the following coordinate compounds the central metal atom obeys the EAN rule?

K_{3} [Fe (CN)_{6}]

K_{4} [Fe (CN)_{6}]

[Cu {({NH}_{3})}_{4}] {SO}_{4}

4 All the above

Explanation:

$K_{4} [Fe (CN)_{6}]$ obeys the EAN rule.
$EAN = 26 - 2 + 2 \times 6 = 36$

CHXII09:COORDINATION COMPOUNDS

322107 What is effective atomic number of cobalt in ${[Co {({NH}_{3})}_{6}]}^{3 +} [Co (Z = 27)]$ ?

1 30

2 33

3 27

4 36

Explanation:

${[Co {({NH}_{3})}_{6}]}^{3 +} \Rightarrow Z = 27$
$EAN =$ atomic no - oxdn state $+ (2 \times$ co ordn.no $)$
EAN of ${Co}^{3 +} \Rightarrow 27 - 3 + 2 (6) = 36$

MHTCET - 2021

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CHXII09:COORDINATION COMPOUNDS

322104 What is the oxidation state of cobalt in a coordination complex if it's EAN is 36 and the value of C.N. is 6 (Given : Atomic number of cobalt $= 27$ ).

1 +4

2 +2

3 +1

4 +3

Explanation:

$EAN = Z -$ oxdn.state $+ (2 \times$ coordn.no $)$
$36 = 27 -$ oxdn.state $+ (2 \times 6)$
$36 = 27 -$ oxdn. state +12
$∴$ oxdn.state $= 27 + 12 - 36 = + 3$

MHTCET - 2021

CHXII09:COORDINATION COMPOUNDS

322105 What is the EAN of central metal in $[Ni (gly)_{2}]$ ?

1 30

2 34

3 36

4 32

Explanation:

$EAN = 28 - 2 + 8 = 34$ .

CHXII09:COORDINATION COMPOUNDS

322106 In which of the following coordinate compounds the central metal atom obeys the EAN rule?

K_{3} [Fe (CN)_{6}]

K_{4} [Fe (CN)_{6}]

[Cu {({NH}_{3})}_{4}] {SO}_{4}

4 All the above

Explanation:

$K_{4} [Fe (CN)_{6}]$ obeys the EAN rule.
$EAN = 26 - 2 + 2 \times 6 = 36$

CHXII09:COORDINATION COMPOUNDS

322107 What is effective atomic number of cobalt in ${[Co {({NH}_{3})}_{6}]}^{3 +} [Co (Z = 27)]$ ?

1 30

2 33

3 27

4 36

Explanation:

${[Co {({NH}_{3})}_{6}]}^{3 +} \Rightarrow Z = 27$
$EAN =$ atomic no - oxdn state $+ (2 \times$ co ordn.no $)$
EAN of ${Co}^{3 +} \Rightarrow 27 - 3 + 2 (6) = 36$

MHTCET - 2021

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Question Bank Series

01. Upto 1300 Quenstions
02. Answer Key
03. Explanations

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CHXII09:COORDINATION COMPOUNDS

322104 What is the oxidation state of cobalt in a coordination complex if it's EAN is 36 and the value of C.N. is 6 (Given : Atomic number of cobalt $= 27$ ).

1 +4

2 +2

3 +1

4 +3

Explanation:

$EAN = Z -$ oxdn.state $+ (2 \times$ coordn.no $)$
$36 = 27 -$ oxdn.state $+ (2 \times 6)$
$36 = 27 -$ oxdn. state +12
$∴$ oxdn.state $= 27 + 12 - 36 = + 3$

MHTCET - 2021

CHXII09:COORDINATION COMPOUNDS

322105 What is the EAN of central metal in $[Ni (gly)_{2}]$ ?

1 30

2 34

3 36

4 32

Explanation:

$EAN = 28 - 2 + 8 = 34$ .

CHXII09:COORDINATION COMPOUNDS

322106 In which of the following coordinate compounds the central metal atom obeys the EAN rule?

K_{3} [Fe (CN)_{6}]

K_{4} [Fe (CN)_{6}]

[Cu {({NH}_{3})}_{4}] {SO}_{4}

4 All the above

Explanation:

$K_{4} [Fe (CN)_{6}]$ obeys the EAN rule.
$EAN = 26 - 2 + 2 \times 6 = 36$

CHXII09:COORDINATION COMPOUNDS

322107 What is effective atomic number of cobalt in ${[Co {({NH}_{3})}_{6}]}^{3 +} [Co (Z = 27)]$ ?

1 30

2 33

3 27

4 36

Explanation:

${[Co {({NH}_{3})}_{6}]}^{3 +} \Rightarrow Z = 27$
$EAN =$ atomic no - oxdn state $+ (2 \times$ co ordn.no $)$
EAN of ${Co}^{3 +} \Rightarrow 27 - 3 + 2 (6) = 36$

MHTCET - 2021