CBSE Class 12 Chemistry Coordination Chemistry Assignment

CBSE Class 12 Chemistry Coordination Chemistry Assignment. Students are advised to refer to the attached assignments and practise them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.
 
LEVEL-1 QUESTIONS
1.Define Ligand . Give one example also.
The ion or molecules which are coordinately bonded to central metalatom in the coordination entity are called ligands.
 
2. Why Coordination compounds are coloured?
Due to d-d transition.
 
3. What is Homoleptic complexes?
The complexes in which a metal is bound to only one kind of donorgroups. E.g., [Co(NH3)6]3+
 
4. What is the Oxidation no. of cobalt in K[Co(CO)4]?
+1
 
5. Explain each of the following: coordination entity, ligand, coordination number, coordination polyhedron, homoleptic and heteroleptic.
Answer
(i)Coordination entity:
A coordination entity is an electrically charged radical or species carrying a positive ornegative charge. In a coordination entity, the central atom or ion is surrounded by a suitablenumber of
neutral molecules or negative ions ( called ligands)
 
(ii)Ligands
The neutral molecules or negatively charged ions that surround the metal atom in acoordination entity or a coordinal complex are known as ligands. For example,,Cl−, −OH. Ligands are usually polar in nature and possess at least one unshared pair ofvalence electrons.
 
(iii)Coordination number:
The total number of ligands (either neutral molecules or negative ions) that get attached tothe central metal atom in the coordination sphere is called the coordination number of thecentral metal atom. It is also referred to as its ligancy.
 
(vi)Coordination polyhedron:
Coordination polyhedrons about the central atom can be defined as the spatial arrangement of the ligands that are directly attached to the central metal ion in the coordination sphere.
 
(v)Homoleptic complexes:
These are those complexes in which the metal ion is bound to only one kind of a donorgroup.
 
(vi)Heteroleptic complexes:
Heteroleptic complexes are those complexes where the central metal ion is bound to morethan one
type of a donor group.
 
6. What is meant by unidentate, didentate and ambidentate ligands? Give two examples for each.
Answer
A ligand may contain one or more unshared pairs of electrons which are called the donorsites of ligands. Now, depending on the number of these donor sites, ligands can be classifiedas follows:
(a)Unidentate ligands: Ligands with only one donor sites are called unidentate ligands. Fore.g., ,Cl− etc.
 
 
Please click the link below to download CBSE Class 12 Chemistry Coordination Chemistry Assignment


Tags: 

 


Click to View or Download pdf file
Click for more Chemistry Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

CBSE Reduced Syllabus Class 9 and 10

The prevailing health emergency in the country and at different parts of the world as well as the efforts to contain the spread of Covid-19 pandemic has resulted in loss of class room teaching due to closure of schools. Therefore the CBSE Board has decided to revise...

Board Exams Class 10 and Class 12 Datesheet 2020

CBSE has announced the datesheet for the remaining exams of class 10 and class 12 exams. The exams are going to start in July. The class 10 and 12th board exams will be conducted for the remaining 29 papers from July 1 to July 15, 2020, at various centers nominated by...

Cogito and The Question Book A series on Thinking skills by CBSE

The Board has dedicated this academic session 2020-21 for ‘Competency Based Learning’. Skills connected to Critical & Creative thinking, Problem Solving, Collaboration and Communication are core to successful living in the 21st Century. To focus on the importance...

Board Exams helpline by CBSE

According to the recent announcement of CBSE, the pending Class 10 and 12 Board exams are going to be held from 01 July to 15 July 2020 in India. Along with this, it has also been decided to resume the free of cost tele-counseling service for students from 9.30 am to 5...

Board Exams Class 10 and 12 Notification by CBSE

Because of the prevailing condition of spread of COVID-19 pandemic in the country, special efforts are required for conducting examinations in a safe manner. As a number of students have shifted from the district of their school to some other district in the country,...

×
Studies Today