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LEARNERS HABITAT
1] The co-ordination number and oxidation number of X in the following compound
[X (SO
4
) (NH
3
)
5
] Cl will be
a) 10 and 3 b) 2 and 6 d) 6 and 4
2] Which of the following is nonionizable?
a) [Co(NH
3
)
3
Cl
3
]
c) [Co(NH
3
)
5
Cl]Cl
2
c) 6 and 3
b) [Co(NH
3
)
4
Cl
2
]Cl
d) [Co(NH
3
)
6
]Cl
2
3] In which of the following compounds the metal is in the lowest oxidation state
a) [Co (NH
3
)
5
 Br]
2
SO
4
b) Fe
3
[Fe(CN)
6
]
2
c) Mn
2
(CO)
10
d) K[PtCl
3
(C
2
H
4
)]
4] Number of electrons gained by Pd (for coordination) in [PdCl
4
]
2-
 is
a) 4 b) 8 c) 10 d) zero
5] In which of the following complex the nickel metal is in the highest oxidation state
a) Ni(CO)
4
b) K
2
NiF
6
c) [Ni(NH
3
)
6
(BF
4
)
2
 d) K
4
[Ni(CN)
6
]
6] The type of isomerism shown by[Co(en)
2
(NCS)
2
]Cl and [Co(en)
2
(NCS)Cl] NCS is
a) co-ordination b) ionization c) linkage d) both b and c
7] Fac, mer isomerism is associated with which of the following general formula?
a) M(A)
2
b) M (AA)
3
c) MABCD d) MA
3
X
3
8] The planar complex (MABCD) gives
a) Two optical isomers b) Two geometrical isomers
c) Three optical isomers d) Three geometrical isomers.
9] Which one of the following square planar complexes will form two geometrical
isomers?
a) MA
4
b) MA
3
B c) MA
2
B
2
d) MAB
3
10] The EAN of Ni in [Ni (CN)
4
]
2-
 is
a) 34 b) 35 c) 36 d) 28
LH Practice Sheet COORDINATION COMPOUNDS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
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FAQs on Question Bank: Coordination Compounds - Chemistry Class 12 - NEET

1. What are coordination compounds in chemistry?
Ans. Coordination compounds are a type of chemical compound that consists of a central metal ion or atom surrounded by ligands. These ligands are usually ions or molecules that donate a pair of electrons to the metal ion, forming coordinate bonds. The coordination number of the metal ion determines the number of ligands attached to it.
2. How are coordination compounds named?
Ans. Coordination compounds are named using a systematic naming scheme called the IUPAC (International Union of Pure and Applied Chemistry) nomenclature. In this system, the ligands are named first, followed by the name of the central metal ion. The oxidation state of the metal ion is indicated using Roman numerals in parentheses. Additionally, prefixes such as "di-" or "tri-" may be used to indicate the number of each ligand.
3. What is the role of ligands in coordination compounds?
Ans. Ligands play a crucial role in coordination compounds. They are responsible for forming coordinate bonds with the central metal ion, providing the metal ion with the necessary electrons to complete its octet or achieve a stable electron configuration. Ligands can be neutral molecules or ions, and their properties greatly influence the overall chemical and physical properties of the coordination compound.
4. How do coordination compounds exhibit different colors?
Ans. The colors exhibited by coordination compounds are due to the presence of unpaired d-electrons in the metal ion's d-orbitals. When light interacts with these d-electrons, they absorb certain wavelengths and reflect others, resulting in the observed color. The specific color depends on factors such as the metal ion, its oxidation state, and the ligands attached to it. This phenomenon is known as d-d transition.
5. What are some applications of coordination compounds?
Ans. Coordination compounds find various applications in fields such as medicine, catalysis, and materials science. Some common applications include the use of coordination compounds as anticancer drugs, MRI contrast agents, and catalysts in industrial chemical processes. Coordination compounds also play a crucial role in biological systems, such as in the transport of oxygen by hemoglobin in blood.
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