NCERT Class 12 Chemistry Solutions Coordination Compounds

NCERT Class 12 Chemistry Solutions Coordination Compounds with answers available in Pdf for free download. The NCERT Solutions for Class 12 Chemistry with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 12 by CBSE, NCERT and KVS. Solutions to questions given in NCERT book for Class 12 Chemistry are an important part of exams for Grade 12 Chemistry and if practiced properly can help you to get higher marks. Refer to more Chapter-wise Solutions for NCERT Class 12 Chemistry and also download more latest study material for all subjects

Coordination Compounds Class 12 NCERT Solutions

Class 12 Chemistry students should refer to the following NCERT questions with answers for Coordination Compounds in standard 12. These NCERT Solutions with answers for Grade 12 Chemistry will come in exams and help you to score good marks

Coordination Compounds NCERT Solutions Class 12

NCERT Class 12 Chemistry Solutions Coordination Compounds - NCERT Solutions prepared for CBSE students by the best teachers in Delhi. 

Class XII  Chemistry

Chapter 9 – Coordination Compounds

Question 1:

Explain the bonding in coordination compounds in terms of Werner’s postulates.


Werner’s postulates explain the bonding in coordination compounds as follows:

(i) A metal exhibits two types of valencies namely, primary and secondary valencies. Primary valencies are satisfied by negative ions while secondary valencies are satisfied by both negative and neutral ions.

(In modern terminology, the primary valency corresponds to the oxidation number of the metal ion, whereas the secondary valency refers to the coordination number of the metalion.

(ii) A metal ion has a definite number of secondary valencies around the central atom. Also, these valencies project in a specific direction in the space assigned to the definite geometry of the coordination compound.

(iii) Primary valencies are usually ionizable, while secondary valencies are non-ionizable.


Question 2:

Explain with two examples each of the following: coordination entity, ligand, coordination number, coordination polyhedron, homoleptic and heteroleptic.


(i) Coordination entity: A coordination entity is an electrically charged radical or species carrying a positive or negative charge. In a coordination entity, the central atom or ion is surrounded by a suitable number of neutral molecules or negative ions ( called ligands). 

(ii) Ligands: The neutral molecules or negatively charged ions that surround the metal atom in a coordination entity or a coordinal complex are known as ligands. 

(iii) Coordination number: The total number of ligands (either neutral molecules or negative ions) that get attached to the central metal atom in the coordination sphere is called the coordination number of the central metal atom. It is also referred to as its ligancy.


Question 3:

Using IUPAC norms write the formulas for the following:

(i) Tetrahydroxozincate(II)

(ii) Potassium tetrachloridopalladate(II)

(iii) Diamminedichloridoplatinum(II)

(iv) Potassium tetracyanonickelate(II)

(v) Pentaamminenitrito-O-cobalt(III)

(vi) Hexaamminecobalt(III) sulphate

(vii) Potassium tri(oxalato)chromate(III)

(viii) Hexaammineplatinum(IV)

(ix) Tetrabromidocuprate(II)

(x) Pentaamminenitrito-N-cobalt(III) 

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