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Amongst the following complex compounds . . . . . . . . . Which will follow the Sidgwick EAN rule?

(i) $[Cr (CO)_{3} (NO)_{3}]$

(ii) $[({Ph}_{3} P)_{2} {PdCl}_{2}]$

(iii) $[NiBrCl (en)_{2}]$
(iv) ${Na}_{4} [Fe (CN)_{5} NOS]$

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Important Questions on Coordination Compounds

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

Which of the following types of valences, according to Werner's theory, is also called as primary valence ?

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

The volume $(i n m L)$ of $0.125 M {A g N O}_{3}$ required to quantitatively precipitate chloride ions in $0.3 g$ of $[C o {(N H_{3})}_{6}] C l_{3}$ is __________.
${}^{M}{[C o {(N H_{3})}_{6}]} C l_{3} = 267.46 g / m o l$
${}^{M}{A g N O}_{3} = 169.87 g / m o l$

Report the nearest integer as the answer.

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

Addition of excess of ${AgNO}_{3}$ to an aqueous solution of $1$ mole of ${PdCl}_{2} \cdot 4 {NH}_{3}$ gives $2$ moles of $AgCl$ . The conductivity of this solution corresponds to:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

Which of the following complex ions is most stable?

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

Which of the following co-ordinate complexes is an exception to EAN rule?

(Given At. Number Pt = 78, Fe = 26, Zn = 30, Cu = 29)

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

A d-block metal

M

forms two complexes with the formulae

{MCl}_{4} . 2 HCl

and

{MCl}_{2} . 2 {NH}_{3}

. When excess of

A g N O_{3}

solution is added to

1

mole of each complex,

A g C l

precipitate is not formed. The secondary valency of metal

M

in the complexes is respectively

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

According to Werner’s theory the geometry of the complex is determined by

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

The number of moles of ions formed on complete ionisation of

1

mole of

[Co {({NH}_{3})}_{3} {Cl}_{3}]

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

The number of ions produced in water by dissolution of the complex having the empirical formula,

{CoCl}_{3} 4 {NH}_{3},

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

The correct order of the stoichiometries of

AgCl

formed when

{AgNO}_{3}

is treated in excess with the complexes:

{CoCl}_{3} . 6 {NH}_{3}, {CoCl}_{3} . 5 {NH}_{3}, {CoCl}_{3} . 4 {NH}_{3}

, respectively, is:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

The conductivity measurement of a coordination compound of cobalt (III) shows that it dissociates into 3 ions in solution. The compound is

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at

25^{o} C

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

The

EAN

value

[Ti {(σ - C_{6} H_{5})}_{2} {(π - C_{5} H_{5})}_{2}] °

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

What is effective atomic number of

Fe

{[Fe {(CN)}_{6}]}^{4 -}

(At. no. of

Fe = 26

)

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

Primary valency of

Co

[Co {(en)}_{2} {Cl}_{2}] Cl

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

The secondary valency and the number of hydrogen bonded water molecule(s) in ${CuSO}_{4} \cdot 5 H_{2} O$ , respectively, are:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

On complete reaction of ${FeCl}_{3}$ with oxalic acid in aqueous solution containing $KOH$ , resulted in the formation of product $A$ . The secondary valency of Fe in the product A is ______ .

(Round off to the Nearest Integer).

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

Which one of the following complexes will consume more equivalents of aqueous solution of

{AgNO}_{3}

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

On treatment of

100 mL

0.1 M

solution of

{CoCl}_{3} . 6 H_{2} O

with excess

{AgNO}_{3}; 1 .2 \times 10^{22}

ions are precipitated. The complex is:

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Effective atomic number

2.33

g of compound

X

(empirical formula

{CoH}_{12} N_{4} {Cl}_{3}

) upon treatment with excess

{AgNO}_{3}

solution produces

1 .435 g

of white precipitate. The primary and secondary valencies of cobalt in compound

X,

respectively, are

[Given: Atomic mass:

C o = 59, C l = 35.5, A g = 108]

Amongst the following complex compounds . . . . . . . . . Which will follow the Sidgwick EAN rule? (i) Cr(CO)3(NO)3 (ii) [(Ph3P)2 PdCl2] (iii) [NiBrCl (en)2] (iv) Na4[Fe(CN)5NOS]

Important Questions on Coordination Compounds

Learn and Prepare for any exam you want !

Amongst the following complex compounds . . . . . . . . . Which will follow the Sidgwick EAN rule?

(i) $[Cr (CO)_{3} (NO)_{3}]$

(ii) $[({Ph}_{3} P)_{2} {PdCl}_{2}]$

(iii) $[NiBrCl (en)_{2}]$
(iv) ${Na}_{4} [Fe (CN)_{5} NOS]$