Atomic Structure and Chemical Bonding Exe-4E Very Short Chemistry Class-9 ICSE Selina Publishers

Atomic Structure and Chemical Bonding Exe-4E Very Short Chemistry Class-9 ICSE Selina Publishers Solutions Chapter-4. Step By Step ICSE Selina Concise Solutions of Chapter-4 Atomic Structure and Chemical Bonding with All Exercise including MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type, Numerical and Structured/Application Questions Solved . Visit official Website CISCE for detail information about ICSE Board Class-9.

Atomic Structure and Chemical Bonding Exe-4E Very Short Chemistry Class-9 ICSE Concise Selina Publishers

Board ICSE
Publications Selina Publication
Subject Chemistry
Class 9th
Chapter-4 Atomic Structure and Chemical Bonding
Book Name Concise
Topics Solution of Exercise – 4E Very Short Answer Type
Academic Session 2023-2024

Exercise – 4E Very Short Answer Type

Atomic Structure and Chemical Bonding Class-9 Chemistry Concise Solutions  

Page-81

Question 1.

Match the atomic numbers 4,8,10,15 and 19 with each of the following:

(a) Element which can form trivalent ion

(b) Element with four shells

(c) Element with 6 valence electrons

(d) Element which does not form ion

Answer:

(a) Atomic number 15
Electronic configuration (15): 2,8,5

(b) Atomic number 19
Electronic configuration (19): 2,8,8,1

(c) Atomic number 8
Electronic configuration (8): 2,6

(d) Atomic number 10
Electronic configuration (10): 2,8

Question 2.

Identify the following reactions as either oxidation or reduction:

Identify the following reactions as either oxidation or reduction:

(i) O + 2e → O2-

(ii) K – e → K+

(iii) Fe3+ + e → Fe2+

(iv) Zn → Zn2+ + 2e-

Answer:

(i) Reduction

(ii) Oxidation

(iii) Reduction

(iv) Oxidation

Question 3.

Give the terms for the following definitions:

(a) A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.

(b) A bond formed by transfer of electron(s).

Answer:

(a) Single covalent bond

(b) Electrovalent bond

Question 4. 

Name or state the following:

(a) An element having valency zero

(b) Metal with valency one

(c) Atoms of the same element differing in mass number

(d) Elements having same mass number but different atomic number

(e) Bond formed by transfer of electron(s)

(f) Ion formed by gain of electron(s)

Answer:

(a) Helium

(b) Lithium

(c) Hydrogen: 11H, 21H, 31H

(d)  4018Ar and 4020Ca

(e) Ionic bond

(f) Anion

—  : End of Atomic Structure and Chemical Bonding Exe-4E Very Short Answer Class-9 ICSE Chemistry Solutions :–

Return to  Return to Concise Selina ICSE Chemistry Class-9 

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