BLEPT Reviewer 2 CHEMISTRY

BLEPT Reviewer

Instructions:

Please answer each question to the best of your ability. Each question is multiple choice, and only one answer per question is correct. Select the most appropriate answer from the options provided.

When you have completed all questions, click the "Submit" button at the bottom of the page to see your score. Good luck!

1. What is the atomic number of Oxygen?

A) 10
B) 8
C) 6
D) 12

2. What is the chemical formula of sulfuric acid?

A) H₂SO₄
B) HNO₃
C) HCl
D) H₃PO₄

3. Which element is a noble gas?

A) Nitrogen
B) Oxygen
C) Neon
D) Hydrogen

4. What type of bond is formed by the sharing of electrons?

A) Ionic bond
B) Covalent bond
C) Metallic bond
D) Hydrogen bond

5. What is the pH of a neutral solution at 25°C?

A) 5
B) 7
C) 6
D) 8

6. Which of the following is an alkaline earth metal?

A) Sodium
B) Potassium
C) Iron
D) Calcium

7. Which gas turns limewater milky?

A) Carbon dioxide
B) Oxygen
C) Hydrogen
D) Nitrogen

8. What is the molar mass of water (H₂O)?

A) 20 g/mol
B) 15 g/mol
C) 18 g/mol
D) 16 g/mol

9. What is Avogadro’s number?

A) 3.01 × 10²³
B) 9.02 × 10²³
C) 6.02 × 10²³
D) 1.02 × 10²³

10. Which of the following is NOT a diatomic molecule?

A) O₂
B) N₂
C) H₂
D) He

11. Which process separates a solid from a liquid?

A) Distillation
B) Filtration
C) Evaporation
D) Sublimation

12. What is the oxidation state of iron in Fe₂O₃?

A) +2
B) 0
C) +3
D) +1

13. Which of the following is an organic compound?

A) NaCl
B) CH₄
C) H₂O
D) CO₂

14. Which subatomic particle has a negative charge?

A) Electron
B) Proton
C) Neutron
D) Nucleus

15. What is the term for a substance made of only one type of atom?

A) Mixture
B) Compound
C) Solution
D) Element

16. What is the unit of pressure in the SI system?

A) mmHg
B) Pascal
C) Atmosphere
D) Torr

17. In a redox reaction, what happens during reduction?

A) Gain of oxygen
B) Gain of electrons
C) Loss of electrons
D) Loss of hydrogen

18. What is the most abundant gas in Earth's atmosphere?

A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen

19. What is the common name for solid carbon dioxide?

A) Ice
B) Snow
C) Dry ice
D) Carbon snow

20. What is the main component of natural gas?

A) Methane
B) Ethane
C) Propane
D) Butane

21. Which of the following metals is liquid at room temperature?

A) Lead
B) Mercury
C) Silver
D) Aluminum

22. Which property describes a material's ability to dissolve in water?

A) Solubility
B) Malleability
C) Ductility
D) Conductivity

23. Which of the following is a metalloid?

A) Sodium
B) Silicon
C) Gold
D) Calcium

24. What type of reaction is C + O₂ → CO₂?

A) Decomposition
B) Combination
C) Single replacement
D) Double replacement

25. What is the most electronegative element?

A) Oxygen
B) Fluorine
C) Nitrogen
D) Chlorine

26. Which type of reaction involves an exchange of ions between two compounds?

A) Decomposition
B) Combination
C) Single replacement
D) Double replacement

27. What is the chemical formula for ammonia?

A) NH₂
B) NH₄
C) NH₃
D) NO₃

28. What is the term for a homogeneous mixture?

A) Compound
B) Solution
C) Suspension
D) Colloid

29. Which scientist proposed the planetary model of the atom?

A) Dalton
B) Bohr
C) Rutherford
D) Thomson

30. What type of bond is NaCl?

A) Covalent bond
B) Ionic bond
C) Metallic bond
D) Hydrogen bond

Result