Quiz about Chemistry Third Term Examination 2023/2024

Question 1

Which element is a noble gas?

Accepted Answer

Neon

Answer

Nitrogen

Answer

Sodium

Answer

Nickel

Question 2

How many covalent bonds does each carbon atom form in graphite?

Accepted Answer

3

Answer

2

Answer

4

Answer

5

Question 3

Which statement correctly compares the density of diamond and graphite?

Accepted Answer

Diamond is more dense than graphite.

Answer

Diamond is less dense than graphite.

Answer

Diamond and graphite have the same density.

Answer

Graphite is harder than diamond.

Question 4

What is the main source of carbon monoxide in urban areas?

Accepted Answer

Vehicles

Answer

Power plants

Answer

Forest fires

Answer

Industrial emissions

Question 5

Which of the following salts is commonly known as table salt?

Accepted Answer

Sodium chloride (NaCl)

Answer

Calcium carbonate (CaCO3)

Answer

Potassium nitrate (KNO3)

Answer

Magnesium sulfate (MgSO4)

Question 6

Which of these phenomenum is not an evidence that support kinetic theory of matter.

Accepted Answer

Capillarity

Answer

Brownian motion

Answer

Diffusion

Answer

Omosis

Question 7

Which of the following elements has a complete outer shell?

Accepted Answer

Neon (Ne)

Answer

Hydrogen (H)

Answer

Carbon (C)

Answer

Sodium (Na)

Question 8

Which pollutant primarily causes acid rain?

Accepted Answer

Sulfur dioxide

Answer

Carbon dioxide

Answer

Nitrogen dioxide

Answer

Methane

Question 9

What is natural gas primarily composed of?

Accepted Answer

Hydrocarbons

Answer

Carbon dioxide

Answer

Oxygen

Answer

Nitrogen

Question 10

What is the approximate percentage of oxygen in the Earth's atmosphere?

Accepted Answer

21%

Answer

50%

Answer

78%

Answer

0.03%

Question 11

What does the kinetic theory of matter state?

Accepted Answer

Matter is made up of small particles that are always in motion.

Answer

Matter is made up of small particles that are always at rest.

Answer

Matter is made up of large particles that move randomly.

Answer

Matter is made up of large particles that are always in motion.

Question 12

Which of the following is a transition metal?

Accepted Answer

Copper

Answer

Silicon

Answer

Sulfur

Answer

Phosphorus

Question 13

Which of the following is not a characteristic of sedimentary rocks?

Accepted Answer

Can be formed from the cooling of magma or lava

Answer

Often contain fossils

Answer

Formed from the accumulation and cementation of sediments

Answer

Typically have crystal grains arranged in layers

Question 14

The scientist that discovered the atomic particle known as electron is ?

Accepted Answer

Joseph Thompson

Answer

Albert Einstein

Answer

Ernest Rutherford

Answer

James Chadwick

Question 15

Which of the following raw materials is used in a plastic industry

Accepted Answer

Ethene

Answer

Methane

Answer

Calcium

Answer

Hydrogen

Question 16

The amorphous carbon used in making shoe polish and printer ink is

Accepted Answer

Carbon black

Answer

Animal charcoal

Answer

Wood charcoal

Answer

Graphite

Question 17

What is the term for the change from a solid to a gas?

Accepted Answer

Sublimation

Answer

Condensation

Answer

Vaporization

Answer

Deposition

Question 18

What is the ozone layer's primary function?

Accepted Answer

Absorbing ultraviolet (UV) radiation

Answer

Absorbing visible light

Answer

Absorbing infrared radiation

Answer

Generating oxygen gas

Question 19

What do elements in the same period of the periodic table have in common?

Accepted Answer

The same number of shells

Answer

The same atomic number

Answer

Similar chemical properties

Answer

Similar physical properties

Question 20

Which of the following is true about metamorphic rocks?

Accepted Answer

They are formed under conditions of high heat and pressure.

Answer

They are formed from the cooling of magma.

Answer

They contain fossils.

Answer

They are formed from the accumulation of sediments.

Question 21

What is the name of the element with the symbol 'Au'?

Accepted Answer

Gold

Answer

Silver

Answer

Aluminum

Answer

Uranium

Question 22

Why can graphite conduct electricity?

Accepted Answer

It has free-moving electrons within its layers.

Answer

It has a 3D crystal lattice.

Answer

It is composed of metal atoms.

Answer

It has ionic bonds.

Question 23

Which type of chemicals are more likely to require specialized handling and safety precautions?

Accepted Answer

Heavy chemicals

Accepted Answer

Organic chemicals

Answer

Fine chemicals

Answer

Agricultural chemicals

Question 24

Which of the following actions can help prevent further ozone layer depletion?

Accepted Answer

Phasing out the use of substances harmful to the ozone layer

Answer

Using more aerosol sprays containing CFCs

Answer

Increasing deforestation

Answer

Increasing emissions of greenhouse gases

Question 25

Which of these elements is in the same group as fluorine?

Accepted Answer

Bromine

Answer

Potassium

Answer

Proactine

Answer

Hydrogen

Question 26

What holds the nucleus of an atom together despite the repulsion between protons?

Accepted Answer

Strong nuclear force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Weak nuclear force

Question 27

The pressure exerted by a gas is a result of:

Accepted Answer

collisions of gas particles with the container walls

Answer

the force of gravity

Answer

the weight of the gas particles

Answer

the size of the gas particles

Question 28

Which element has a valency of 2 and is found in Group 2 of the periodic table?

Accepted Answer

Magnesium (Mg)

Answer

Potassium (K)

Answer

Chlorine (Cl)

Answer

Nitrogen (N)

Question 29

Which of these is a halogen?

Accepted Answer

Chlorine

Answer

Argon

Answer

Zinc

Answer

Calcium

Question 30

Which of these statements is true about igneous rocks?

Accepted Answer

They are formed from cooling and solidification of magma or lava.

Answer

They are formed from the compaction of sediments.

Answer

They contain fossils.

Answer

They are the result of heat and pressure on existing rocks.

Question 31

Where is the ozone layer located in the Earth's atmosphere?

Accepted Answer

Stratosphere

Answer

Troposphere

Answer

Mesosphere

Answer

Thermosphere

Question 32

Which of the following is an example of an igneous rock?

Accepted Answer

Granite

Answer

Sandstone

Answer

Limestone

Answer

Shale

Question 33

What happens to the pressure of a gas if the volume of its container decreases while the temperature remains constant?

Accepted Answer

The pressure increases.

Answer

The pressure decreases.

Answer

The pressure remains the same.

Answer

The pressure disappears.

Question 34

According to the kinetic theory, increasing the temperature of a substance will typically result in:

Accepted Answer

faster particle movement

Answer

slower particle movement

Answer

no change in particle movement

Answer

change in particle shape

Question 35

What is a distinguishing feature of sedimentary rocks compared to other types of rocks?

Accepted Answer

They often have layers or strata.

Answer

They have a glassy texture.

Answer

They are formed from molten material.

Answer

They are formed under high pressure and temperature.

Question 36

What is the main difference between magma and lava?

Accepted Answer

Magma is molten rock underground, while lava is molten rock on the Earth's surface.

Answer

Magma is denser than lava.

Answer

Lava is molten rock underground, while magma is molten rock on the Earth's surface.

Answer

Magma and lava are the same.

Question 37

Which of the following substances is hygroscopic?

Accepted Answer

Potassium permanganate

Answer

Table salt

Answer

Copper oxide

Answer

Baking soda

Question 38

Which of the following is considered a non-point source of water pollution?

Accepted Answer

Fertilizer runoff from farms

Answer

Industrial discharge pipes

Answer

Sewage treatment plants

Answer

Oil spills from tankers

Question 39

A colorless, odorless gas that decreases the blood's ability to carry oxygen. Can cause faintness, death.

Accepted Answer

Carbon monoxide

Answer

Nitrogen oxides

Answer

Ground-level ozone

Answer

Sulfur dioxide

Question 40

Which of the following substances commonly exhibits efflorescence?

Accepted Answer

Sodium carbonate decahydrate

Answer

Sodium chloride

Answer

Copper sulfate pentahydrate

Answer

Potassium nitrate

Question 41

How many electrons are there in the outermost shell of a chlorine atom? (Atomic number 17)

Accepted Answer

7

Answer

5

Answer

6

Answer

8

Question 42

What is the electronic configuration of an argon atom? (Atomic number 18)

Accepted Answer

2, 8, 8

Answer

2, 8, 10

Answer

2, 8, 6

Answer

2, 10, 6

Question 43

The electronic configuration 1s² 2s²2p⁶3s² 3p⁴ represent what element or ion ?

Accepted Answer

P

Answer

Si

Answer

Ca

Answer

Na

Question 44

The IUPAC nomenclature of the compound LiAlH4 is?

Accepted Answer

Lithium tetrahydridoaluminate (III)

Answer

Aluminium tetrahydrido lithium

Answer

Tetrahydrido lithium aluminate (III)

Answer

Lithium aluminium hydride

Question 45

How many elements are in the first period of the periodic table?

Accepted Answer

2

Answer

8

Answer

18

Answer

32

Question 46

The basicity of Trioxosilicate (IV) acid [H2SiO3] is

Accepted Answer

3

Answer

2

Answer

1

Answer

4

Question 47

Which of the following statements is true about carbon dioxide and carbon monoxide?

Accepted Answer

Both are odorless and colorless gases.

Answer

Both are produced by complete combustion.

Answer

Both are essential for human life.

Answer

Both have the same impact on the environment.

Question 48

What is the number of neutrons in Magnesium atom ?

Accepted Answer

24

Answer

12

Answer

23

Answer

8

Question 49

How do particles in a liquid compare to particles in a solid?

Accepted Answer

They are packed less tightly and move more.

Answer

They are packed more tightly and move less.

Answer

They are packed tightly and move freely.

Answer

They are packed less tightly and do not move.

Question 50

Which property of diamond makes it suitable for use in jewelry?

Accepted Answer

Its hardness and brilliance

Answer

Its electrical conductivity

Answer

Its ability to conduct heat

Answer

Its layered structure

Question 51

The elements that are monoatomic are

Accepted Answer

II & III only

Accepted Answer

II & V only

Answer

I, IV and V only

Answer

I, III & IV only

Question 52

Which group contains the most reactive metals?

Accepted Answer

Group 1 (Alkali Metals)

Answer

Group 2 (Alkaline Earth Metals)

Answer

Group 7 (Halogens)

Answer

Group 8 (Noble Gases)

Question 53

Which element forms an ion with a 1- charge?

Accepted Answer

Fluorine (F)

Answer

Potassium (K)

Answer

Oxygen (O)

Answer

Calcium (Ca)

Question 54

What is the percentage by mass of sodium in sodium hydroxide [Na=23,O=16,H=1]?

Accepted Answer

57.5%

Answer

40.4%

Answer

45.5%

Answer

73.0%

Question 55

Which gas is commonly used in fire extinguishers?

Accepted Answer

Carbon dioxide

Answer

Carbon monoxide

Answer

Oxygen

Answer

Nitrogen

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