10 𝗝𝗔𝗠𝗕 𝗖𝗛𝗘𝗠𝗜𝗦𝗧𝗥𝗬 𝗣𝗔𝗦𝗧 𝗤𝗨𝗘𝗦𝗧𝗜𝗢𝗡𝗦 — 𝘊𝘈𝘕 𝘠𝘖𝘜 𝘚𝘊𝘖𝘙𝘌 8/10? React with ✅ if you finish. Answers drop tonight. 1. Which of the following is NOT a property of ionic compounds? A. High melting point B. Conduct electricity when molten C. Soluble in organic solvents D. Exist as crystalline solids 2. The IUPAC name of CH₃CH₂OH is: A. Methanol B. Ethanol C. Propanol D. Butanol 3. How many moles are in 44g of CO₂? (C=12, O=16) A. 1 mol B. 2 mol C. 0.5 mol D. 4 mol 4. Which gas is produced when zinc reacts with dilute H₂SO₄? A. Oxygen B. Sulphur dioxide C. Hydrogen D. Nitrogen 5. The process by which liquid changes to vapour below its boiling point is: A. Condensation B. Evaporation C. Sublimation D. Distillation 6. An element with atomic number 17 belongs to which group? A. Group I B. Group VI C. Group VII D. Group 0 7. Which of the following is an example of an ester? A. CH₃COOH B. CH₃OCH₃ C. CH₃COOCH₃ D. CH₃CHO 8. The bond in hydrogen gas (H₂) is: A. Ionic B. Covalent C. Metallic D. Dative 9. Avogadro's number is: A. 6.02 × 10²¹ B. 6.02 × 10²³ C. 3.0 × 10⁸ D. 1.6 × 10⁻¹⁹ 10. Which of the following undergoes sublimation? A. Ice B. Iodine C. Sodium D. Sulphuric acid

$$\text{Moles} = \frac{\text{Mass}}{\text{Molar mass}} = \frac{44 \text{ g}}{44 \text{ g/mol}} = 1 \text{ mol}$$

The correct option is A.
A. 1 mol

4. Which gas is produced when zinc reacts with dilute H₂SO₄?
When a reactive metal like zinc reacts with a dilute acid like sulfuric acid, hydrogen gas is produced.

$$\text{Zn(s)} + \text{H}_2\text{SO}_4\text{(aq)} \longrightarrow \text{ZnSO}_4\text{(aq)} + \text{H}_2\text{(g)}$$

The correct option is C.
C. Hydrogen

5. The process by which liquid changes to vapour below its boiling point is:
Evaporation is the process where a liquid changes into a gas or vapor without reaching its boiling point.
The correct option is B.
B. Evaporation

6. An element with atomic number 17 belongs to which group?
An element with atomic number 17 has an electron configuration of 2, 8, 7. It has 7 valence electrons, placing it in Group VII (halogens) of the periodic table.
The correct option is C.
C. Group VII

7. Which of the following is an example of an ester?
Esters have the general formula R-COO-R', where R and R' are alkyl groups. CH₃COOCH₃ fits this structure.
The correct option is C.
C. CH₃COOCH₃

8. The bond in hydrogen gas (H₂) is:
Hydrogen gas (H₂) consists of two hydrogen atoms sharing a pair of electrons to achieve a stable electron configuration. This sharing of electrons forms a covalent bond.
The correct option is B.
B. Covalent

9. Avogadro's number is:
Avogadro's number is the number of constituent particles (atoms, molecules, ions, etc.) per mole of a substance, approximately $6.022 \times 10^{23}$.
The correct option is B.
B. 6.02 × 10²³

10. Which of the following undergoes sublimation?
Sublimation is the process where a solid changes directly into a gas without passing through the liquid phase. Iodine is a common example of a substance that sublimes.
The correct option is B.
B. Iodine