Unit 1: Fundamentals of Chemistry

What is Fundamentals of Chemistry?

The Fundamentals of Chemistry serve as the foundation for understanding the core principles of the subject. This unit introduces the basic concepts of matter, its properties, and the different states it can exist in. Students explore atomic structure, chemical formulas, and the periodic table, which organizes elements based on their properties. Additionally, the unit covers the types of chemical bonds and reactions that form the basis for more complex chemical processes.

Key Topics in Fundamentals of Chemistry:

• Matter and Its Properties: Understanding the different forms of matter, including solids, liquids, and gases.
• Atomic Structure: Examining the components of an atom, such as protons, neutrons, and electrons.
• Periodic Table: Exploring the organization of elements and their properties.
• Chemical Bonding: Learning about ionic, covalent, and metallic bonds that hold atoms together.
• Chemical Reactions: Understanding the processes that transform substances into new compounds.

Benefits of Studying Fundamentals of Chemistry:

• Foundational Knowledge: Builds the essential groundwork for more advanced Chemistry topics.
• Critical Thinking: Develops problem-solving skills by exploring how substances interact and change.
• Academic Success: Prepares students for further studies in Chemistry and related scientific fields.

This unit is crucial for students to grasp the essential concepts of Chemistry, providing the knowledge necessary to excel in more advanced topics. Whether you’re preparing for exams or looking to deepen your understanding, mastering the fundamentals is key to success in Chemistry.

1. Industrial chemistry deals with manufacturing of compounds

a. in the laboratory
b. on micro scale
c. on commercial scale
d. on economic scale

2. Which of the following compounds can be separated by physical means?

a. mixture
b. element
c. compound
d. radical

3. The most abundant element occurring in the oceans is

a. oxygen
b. hydrogen
c. nitrogen
d. silicon

4. Which of the following element is found in most abundance in the Earth’s crust?

a. oxygen
b. aluminium
c. silicon
d. iron

5. The third abundant gas found in the Earth’s atmosphere is?

a. carbon monoxide
b. oxygen
c. nitrogen
d. argon

6. One amu (atomic mass unit) is equivalent to:

a. 1.66 X 10^-24 mg
b. 1.66 X 10^-24 g
c. 1.66 X 10^-24 kg
d. 1.66 X 10^-23g

7. Which one of the following molecule is not tri-atomic?

a. H₂
b. O₃
c. H₂O
d. CO₂

8. The mass of one mole of water is:

a. 18 amu
b. 18 g
c. 18 mg
d. 18 kg

9. The molar mass of H₂SO₄

a. 98 g
b. 98 amu
c. 9.8 g
d. 9.8 amu

10. Which one of the following is a molecular mass of O₂ in amu?

a. 32 amu
b. 53.12 x 10^-24 amu
c. 1.92 x 10^-25 amu
d. 192.64 x 10^-25 amu

11. How many number of moles are equivalent to 8 grams of CO₂?

a. 0.15
b. 0.18
c. 0.21
d. 0.24

12. Which one of the following pairs has the same number of ions?

a. 1 mole of NaCl and 1 mole of MgCl₂
b. 1/2 mole of NaCl and 1/2 mole of MgCl₂
c. 1/2 mole of NaCl and 1/3 mole of MgCl₂
d. 1/3 mole of NaCl and 1/2 mole of MgCl₂

13. Which one of the following pairs has the same mass?

a. 1 mole of CO and 1 mole of N₂
b. 1 mole of CO and 1 mole of CO₂
c. 1 mole of O₂ and 1 mole of N₂
d. 1 mole of O₂ and 1 mole of CO₂