ICSE Class 10 Chemistry Case Study based questions – Chemical Bonding
On this page we have given ICSE Class 10 Chemistry Chapter 2 Case Study based questions – Chemical Bonding. From 2024 Board exam, ICSE will focus on Technical Based, Analytical Based and Critical Questions in Chemistry Exam. So we Net Ex, has started giving Case Study based questions which is also known as Paragraph Based Questions.
Que No. 1 –
The molecule formed due to the sharing ofelectrons (covalent bond) is called a covalent molecule.The covalency of an atom is the number of itselectrons taking part in the formation of sharedpairs.The bond formed between two atoms (1) with same electronegativity is non-polar(2) with slightly different electronegativity ispolar.
1.) What are the different types of covalent bonds ?
2.) Define polar and non-polar covalent compounds ?
3.) What are the covalencies of hydrogen, oxygen, nitrogen and carbon ?
Que No. 2 –
The bond formed between two atoms by sharing a pair of electrons, provided entirely by one of the combining atoms but shared by both is called a co-ordinate bond.
1.) Write any two examples of the compounds formed by coordinate bonds
2.) Why coordinate bonds also called as dative bond or co-ionic bond ?
3.) What are Doner and Acceptor in coordinate compounds ?
Que No. 3 –
The cation and the anion being oppositely charged attract each other and form a chemical bond. Since this chemical bond formation is due to the electrostatic force of attraction between a cation and an anion, it is called an electrovalent (or an ionic bond).
1.) What are the Conditions for the formation of an electrovalent (or ionic bond)?
2.) What is metallic and non-metallic elements ?
3.) Which element from group 17 is the most electronegative in nature?
Que No. 1 Answers-
1.) Covalent bonds are of following three types:1)Single covalent bond 2) Double covalent bond 3)Triple covalent bond.
2.) The covalent compounds are said to be polarwhen the shared pair of electrons are not at equaldistance between the two atoms and Covalent compounds are non-polar when sharedpair of electron(s) are equally distributed betweenthe two atoms. No charge separation takes place.
3.) The covalency of hydrogen is 1,oxygen 2, nitrogen 3 and carbon 4.
Que No. 2 Answers-
1.) The two examples of coordinate bonds are 1) Ammonia 2)Water.
2.) A coordinate bond has properties of both covalent and ionic bonds. Therefore, it is also called dative or co-lonic bond.
3.) The atom which provides the electron pair for the formation of a coordinate bond is known as the DONOR and the atom or ion sharing the donated electron pair is known as the ACCEPTOR.
Que No. 3 Answers-
1.) The following three conditions are essential for the formation of electrovalent bond 1) Low ionization potential 2) High electron affinity 3)Large electronegativity difference.
2.) A non-metallic element, whose atom readily accepts electrons to form a negatively charged ion is an electronegative element and a metallic element, whose atom readily looses electrons to form a positively charged ion is an electropositive element.
3.) Fluorine is the element from group 17 is the most electronegative in nature.
Also See: This Chapter MCQ Question Answer