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Chemistry: Chapter 2 - Chemical Bonding

This document is the test paper for Chapter 2 - Chemical Bonding from a chemistry textbook. It contains 10 multiple choice and short answer questions assessing knowledge of chemical bonding concepts like ionic and covalent bonding, electron configuration, and formula writing. The questions cover topics such as identifying ionic compounds, drawing electron dot diagrams, explaining covalent bonding, and determining chemical properties based on atomic number.

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Yash Prajapati
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59 views2 pages

Chemistry: Chapter 2 - Chemical Bonding

This document is the test paper for Chapter 2 - Chemical Bonding from a chemistry textbook. It contains 10 multiple choice and short answer questions assessing knowledge of chemical bonding concepts like ionic and covalent bonding, electron configuration, and formula writing. The questions cover topics such as identifying ionic compounds, drawing electron dot diagrams, explaining covalent bonding, and determining chemical properties based on atomic number.

Uploaded by

Yash Prajapati
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Chemistry

Chapter 2 – Chemical Bonding


Test Paper-1


General Instruction:
I. All questions are compulsory.
II. Question No. 1 and 2 carry one mark each.
III. Question No. 3 to 5 carries two marks each.
IV. Question No. 6 to 9 carries three marks each.
V. Question No.10 carries 5 marks.




Question 1: (1)
Name a covalent compound which becomes electrovalent when dissolved in water.


Question 2: (1)
In the formation of magnesium chloride (by direct combination between magnesium and
chlorine), name the substance that is reduced.


Question 3: (2)
Which of the following is not a common characteristic of an electrovalent compound?


a. High melting point
b. Conducts electricity when molten
c. Consists of oppositely charged ions.
d. Ionises when dissolved in water.


Question 4: (2)
Draw electron dot diagram to depict the formation of:


a. Magnesium oxide from 24Mg12 and 16O8.
b. a molecule of chlorine from two atoms of 35Cl17.


Question 5: (2)
Covalent compounds are usually liquids or gases. Explain.


Question 6: (3)
a. In the formation of electrovalent compounds, electrons are transferred from one
element to another. How are electrons involved in the formation of a covalent
compound?
b. The electronic configuration of nitrogen is 2, 5. How many electrons in the outer shell
of a nitrogen atom are not involved in the formation of nitrogen molecule?


















Question 7: (3)
a. Draw an electron dot diagram of a hydronium ion and label the lone pair of electrons.


b. Name a neutral covalent molecule which contains one lone pair electron.




Question 8: (3)
a. Write down the electronic configuration of the following:
27X13
35Y17.


b. Write down the number of electrons in X & neutrons in Y & the formula of the
compound formed by X & Y.




Question 9: (3)
Elements X, Y, Z have atomic numbers 6, 9 and 12 respectively. Which one:


a. forms anion – negative ion;


b. forms cation – positive ion;


c. has 4 electrons in the outermost orbit.




Question 10: (5)
Elements A, B and C have atomic number 9, 20 and 10 respectively. State which one is
i. a non-metal;
ii. a metal;
iii. chemically inert.


Write down the formula of the compound formed by two of the above elements.

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