Home / FBISE Study Portal

MCQs — Matter

Practice questions for Chemistry.

← Back to Matter

Question 41

The existence of an element in two or more different structural forms in the same physical state is called:

A. Isomerism

B. Allotropy

C. Isotopy

D. Polymerization

Question 42

Diamond and graphite are both allotropes of which element?

A. Carbon

B. Silicon

C. Oxygen

D. Sulphur

Question 43

In diamond, each carbon atom is bonded to how many other carbon atoms, forming a rigid three-dimensional structure?

A. Two

B. Three

C. Four

D. Six

Question 44

In graphite, carbon atoms are arranged in flat, layered structures where each atom is bonded to how many other carbon atoms?

A. Two

B. Four

C. Six

D. Three

Question 45

The allotrope of carbon shaped like a hollow, soccer-ball-like cage of 60 carbon atoms is called:

A. Diamond

B. Graphite

C. Buckminsterfullerene (C60)

D. Graphene

Question 46

Why is diamond extremely hard while graphite is soft and slippery?

A. Diamond's rigid 3D bonding structure resists movement, while graphite's layers can slide over each other

B. Diamond has no carbon atoms, unlike graphite

C. Graphite atoms are bonded more strongly than diamond atoms

D. Diamond and graphite have identical structures

Question 47

Why can graphite conduct electricity while diamond cannot?

A. Diamond contains metal atoms, unlike graphite

B. Graphite has free-moving electrons between its layers, while all of diamond's electrons are locked in bonds

C. Graphite has no carbon atoms

D. Diamond conducts electricity better than graphite

Question 48

Diamond is commonly used in cutting and drilling tools mainly because of its:

A. Ability to conduct electricity

B. Softness

C. Colour

D. Extreme hardness

Question 49

Graphite is commonly used as a lubricant and in pencil leads mainly because of its:

A. Extreme hardness

B. Soft, slippery, layered structure

C. Transparency

D. Magnetism

Question 50

A jeweller wants a material that is extremely hard for cutting glass, while an electrician wants a material that conducts electricity well. Which allotropes of carbon would best suit the jeweller and the electrician respectively?

A. Graphite for the jeweller, diamond for the electrician

B. Diamond for both

C. Graphite for both

D. Diamond for the jeweller, graphite for the electrician

Question 51

A homogeneous mixture formed when one substance dissolves completely in another is called a:

A. Suspension

B. Solution

C. Colloid

D. Compound

Question 52

In a solution, the substance that is dissolved is called the:

A. Solvent

B. Precipitate

C. Residue

D. Solute

Question 53

In a solution, the substance that dissolves the solute is called the:

A. Solvent

B. Solute

C. Precipitate

D. Residue

Question 54

A solution is always classified as a:

A. Heterogeneous mixture

B. Pure element

C. Homogeneous mixture

D. Pure compound

Question 55

A solution in which water is the solvent is called a(n):

A. Aqueous solution

B. Gaseous solution

C. Solid solution

D. Colloidal solution

Question 56

Air, a mixture of gases such as nitrogen and oxygen dissolved in one another, is an example of a:

A. Liquid solution

B. Solid solution

C. Suspension

D. Gaseous solution

Question 57

An alloy, such as brass made from copper and zinc, is an example of a:

A. Liquid solution

B. Gaseous solution

C. Solid solution

D. Colloid

Question 58

A solution that contains the maximum amount of solute that can dissolve at a given temperature is called a:

A. Unsaturated solution

B. Saturated solution

C. Supersaturated solution

D. Dilute solution

Question 59

Why does no more solute dissolve once a solution is saturated?

A. The solvent has completely evaporated

B. The solute has changed into a different substance

C. The solution has become a compound

D. The solution has reached the maximum amount of solute the solvent can hold at that temperature

Question 60

In a saturated solution, undissolved solute and dissolved solute exist in a state called:

A. Static equilibrium

B. Dynamic equilibrium

C. Permanent separation

D. Chemical bonding

🎯 How to get the most out of these questions

Attempt each question before revealing the answer.
Read the explanation even when you answered correctly — it reinforces the concept.
Note down any question you got wrong and revisit it the next day.
Use the pagination below the list to work through every page — do not stop at page 1.

📌 MCQs — FAQs

Are the answers in this section verified?

Yes — every answer on this page has been verified. MCQs also include explanations where available.

Can I print these questions?

Yes — use your browser's print option (Ctrl+P / Cmd+P) to print or save the page as PDF.

How often are questions updated?

New questions are added regularly. If a paper pattern changes, existing questions are reviewed and updated.