Free Printable Chemistry Class 9 Unit 4

1.

According to $Octet\ Rule$ , atoms bond to acquire _______ electron configuration.

a)

4

b)

6

c)

8

d)

3

2.

The bonding between $cation$ and $anion$ is called ______________ bond.

a)

covalent

b)

ionic

c)

hydrogen

d)

metallic

3.

The _______________ bond is formed by the $mutual\ sharing$ of electrons between two atoms.

a)

Ionic

b)

Covalent

c)

metallic

d)

hydrogen

4.

Which of the following elements follows the $duplet\ rule$ ?

a)

Hydrogen

b)

Chlorine

c)

Nitrogen

d)

Oxygen

5.

$ns^2np^6$ is the electronic configuration of _______________.

a)

Halogens

b)

Alkali Metals

c)

Alkaline Earth Metals

d)

Noble Gases

6.

Which of the following do not participate in chemical reactions?

a)

Alkali Metals

b)

Halogens

c)

Noble gases

d)

Alkaline Earth Metals

7.

$Ionic\ Compounnds$ as a whole has _____________ charge.

a)

Positve

b)

Negative

c)

No charge

8.

Which of the following equation represents the above process?

a)

$Na+e^-\ \longrightarrow\ Na^{-1}$

b)

$Na\ \rightarrow\ Na^{+1}\ +e^-$

9.

This process shows _________ formation.

a)

Anion

b)

Cation

10.

The bond formed between $Na$ and $F$ is __________.

a)

Ionic Bond

b)

Covalent Bond

c)

Hydrogen Bond

11.

The above picture shows _____________ formation.

a)

Ionic Bond

b)

Covalent Bond

c)

Metallic Bond

12.

The bond between 2 same atoms like $O=O$ is a ____________ bond.

a)

Polar covalent bond

b)

Ionic Bond

c)

Non-polar covalent bond

13.

The bond between $H-Cl$ is

a)

Ionic

b)

Metallic

c)

Polar covalent bond

d)

Non-polar covalent bond

14.

This picture shows which type of inter molecular forces?

a)

Dipole-Dipole interactions

b)

Non-polar covalent bond

c)

London forces

15.

The interaction of electron deficient $Hydrogen$ with $Oxygen,\ Nitrogen\ or\ Fluorine$ is called _____________.

a)

hydrogen bonding

b)

covalent bonding

c)

ionic bonding

16.

This picture shows which type of inter molecular force?

a)

Hydrogen Bonding

b)

Ionic Bonding

c)

Covalent Bonding

17.

The adhesive action of paints and dyes is due to ____________________.

a)

Ionic Bonding

b)

Hydrogen Bonding

c)

Non-polar covalent bonding

18.

In an $ionic\ compound$ , ions bind together by _____________.

a)

sharing of electrons

b)

hydrogen bonding

c)

electrostatic attractive forces

19.

In $NaCl$ crystal, each $Na^+$ ion is surrounded by ____ $Cl^-$ ions.

a)

2

b)

4

c)

6

d)

8

20.

Ionic compounds conduct electricity in _______________ states.

a)

Solid

b)

Aqueous

c)

Molten

d)

Both Molten & Aqueous

21.

In the formation of $AlF_3$ , aluminium atoms loses _____ electrons.

a)

3

b)

5

c)

8

d)

2

22.

Which of the following is $NOT$ true about the formation of $Na_2S$ ?

a)

Each $Na$ loses 1 electron

b)

$Na$ forms cation

c)

$S$ forms anion

d)

$S$ gains 1 electron

23.

Which of the following atoms will form a $cation$ ?

Hint:

The nearest noble gas atomic no. is

18

.

a)

Atomic No. = 20

b)

Atomic No. = 17

c)

Atomic No. = 15

24.

The number of $bonding\ electrons$ in $N_2$ molecule are :

a)

3

b)

6

c)

2

d)

5

25.

Number of $lone\ pairs$ in water molecule are :

a)

2

b)

4

c)

3

d)

8

26.

Molten $NaCl$ in an electrolytic cell conducts electricity due to:

a)

atoms

b)

molecules

c)

ions

27.

Which of the following shows a $Covalent\ bond$ ?

a)

b)

c)

d)

28.

How many $non-bonding\ pairs$ are on Nitrogen in $NH_3$ structure?

a)

1

b)

2

c)

6

d)

3

29.

What is the central atom in $CO_2$ ?

a)

Carbon

b)

Oxygen

30.

Which of the following is an ionic bond?

a)

b)

c)

d)

Chemistry Class 9 Unit 4

Total questions: 30

Worksheet time: 20mins

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