Class 9 MCQs Tests

Chemistry 9 Chapter 3 Practice Test 7

ByMuhammad Zaman January 10, 2022October 29, 2022

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129

Class 9 Chemistry

Chapter 3

Practice MCQs Test No 7

1 / 10

Which of the following has the highest electron affinity?

2 / 10

Ionization results in the ejection of _____.

Protons

Nucleus

Neutrons

Electrons

3 / 10

Element in group II A with smallest atomic radius is _____.

4 / 10

Electronegativity refers to _____.

the energy required to remove an electron from a gaseous atom in the ground state.

the ability of an atom to attract the electrons in a chemical bond toward itself

the ability of an atom to attract the electrons toward nucleus

tendency of an atom to attract a shared electron pair towards itself

5 / 10

Arrange the elements in decreasing ionization energy.

Li<Na<K

K>Na>Li

Li,Na,K

Li>Na>K

6 / 10

When atomic radius increases, electron affinity _____.

Decreases

Remains constant

Increases

Becomes zero

7 / 10

Electron affinity involves _____.

Addition of an electron to the outermost shell of an atom

Addition of an electron to the nucleus of an atom

Removal of an electron from the outermost shell an atom

Addition of a proton to the nucleus

8 / 10

Which element has the highest electronegativity?

9 / 10

Atomic radii decreases because of

All of these

Increase in number of protons

Increase in attractive forces of the nucleus and valence electrons

Increas in number of valence electrons

10 / 10

Ionization energy is a/an _____.

Bond breaking process

Bond making process

Cation formation

Anion formation

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