IGSCE Chemistry topics

Question 1

What is the atomic number of Carbon?

Answer 1

6

Question 2

True or False: The pH scale ranges from 0 to 14.

Answer 2

True

Question 3

Fill in the blank: The chemical formula for water is ____.

Answer 3

H2O

Question 4

What is the process of a liquid turning into gas called?

Answer 4

Evaporation

Question 5

Which particle has a positive charge?

Answer 5

Proton

Question 6

What is the main gas produced during photosynthesis?

Answer 6

Oxygen

Question 7

Multiple Choice: Which of the following is an alkali metal? a) Sodium b) Chlorine c) Iron

Answer 7

a) Sodium

Question 8

What is the symbol for Gold?

Answer 8

Au

Question 9

True or False: An ion is an atom that has lost or gained electrons.

Answer 9

True

Question 10

What is the term for a mixture that has a uniform composition?

Answer 10

Homogeneous mixture

Question 11

Fill in the blank: The chemical reaction where an acid reacts with a base is called ____.

Answer 11

Neutralization

Question 12

What is the main component of natural gas?

Answer 12

Methane

Question 13

Multiple Choice: Which of the following is a noble gas? a) Oxygen b) Argon c) Nitrogen

Answer 13

b) Argon

Question 14

What is the law that states mass is neither created nor destroyed in a chemical reaction?

Answer 14

Law of Conservation of Mass

Question 15

True or False: An exothermic reaction absorbs heat from the surroundings.

Answer 15

False

Question 16

What is the term for the energy required to start a chemical reaction?

Answer 16

Activation energy

Question 17

Fill in the blank: The process of separating a liquid from a solid by boiling is called ____.

Answer 17

Distillation

Question 18

What is the pH of a neutral solution?

Answer 18

7

Question 19

Which type of bond involves the sharing of electron pairs?

Answer 19

Covalent bond

Question 20

Multiple Choice: What is the primary gas in the Earth’s atmosphere? a) Oxygen b) Nitrogen c) Carbon Dioxide

Answer 20

b) Nitrogen

Question 21

What is the term for a substance that speeds up a chemical reaction without being consumed?

Answer 21

Catalyst

Question 22

True or False: Ionic compounds are generally soluble in water.

Answer 22

True

Question 23

What is the formula for calculating the number of moles?

Answer 23

Moles = Mass (g) / Molar Mass (g/mol)

Question 24

Fill in the blank: The atomic mass of an element is the weighted average of the masses of its ____.

Answer 24

Isotopes

Question 25

What type of reaction occurs when a substance combines with oxygen?

Answer 25

Combustion

Question 26

Multiple Choice: Which of the following is not a state of matter? a) Solid b) Liquid c) Plasma d) Energy

Answer 26

d) Energy

Question 27

What is the term for the amount of space occupied by an object?

Answer 27

Volume

Question 28

True or False: Acids turn litmus paper red.

Answer 28

True

Question 29

What is the chemical formula for sodium chloride?

Answer 29

NaCl

Question 30

Fill in the blank: The smallest unit of a chemical compound is called a ____.

Answer 30

Molecule

Question 31

What is the main purpose of the periodic table?

Answer 31

To organize elements based on their properties

Question 32

Multiple Choice: Which of the following elements is a halogen? a) Helium b) Bromine c) Sodium

Answer 32

b) Bromine

Question 33

What is the process by which a solid changes directly into a gas called?

Answer 33

Sublimation

Question 34

True or False: Metals are good conductors of electricity.

Answer 34

True

Question 35

What is the term for the energy stored in chemical bonds?

Answer 35

Chemical energy

Question 36

Fill in the blank: The main component of air is ____.

Answer 36

Nitrogen

Question 37

What is the formula for carbon dioxide?

Answer 37

CO2

Question 38

Multiple Choice: Which of the following is a characteristic of acids? a) Bitter taste b) Sour taste c) Slippery feel

Answer 38

b) Sour taste

Question 39

What is the term for the concentration of a solution?

Answer 39

Molarity

Question 40

True or False: The boiling point of water is 100°C at standard atmospheric pressure.

Answer 40

True

Question 41

Fill in the blank: The process of a gas turning into a liquid is called ____.

Answer 41

Condensation

Question 42

What is the term for the chemical reaction that occurs in the presence of light?

Answer 42

Photochemical reaction

Question 43

Multiple Choice: Which of the following is a diatomic molecule? a) Helium b) Oxygen c) Argon

Answer 43

b) Oxygen

Question 44

What is the primary function of a buffer solution?

Answer 44

To maintain pH levels

Question 45

True or False: All metals are solid at room temperature, except for mercury.

Answer 45

True

Question 46

What is the term for the temperature at which a liquid becomes a gas?

Answer 46

Boiling point

Question 47

Fill in the blank: The chemical process of breaking down a compound into simpler substances is called ____.

Answer 47

Decomposition