Chemistry Quiz 33 (20 MCQs)

Quiz Instructions

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1. What is the pH of a solution that results from the complete neutralization of an HCl solution with NaOH solution?

Correct Answer: D) 7.

2. The monomer of a protein is called .....

Correct Answer: A) An amino acid.

3. What happens when a neutral calcium atom becomes a calcium ion with a +2 charge?

Correct Answer: B) The atom loses two electrons.

4. If an atom has 5 protons and 4 electrons, what is its charge?

Correct Answer: B) Positive.

5. Atoms are mostly filled with?

Correct Answer: B) Empty space.

6. All noble gases are?

Correct Answer: C) Colourless and odourless.

7. The gases H2, O2, and N2 are considered to be .....

Correct Answer: B) Compound.

8. During lab activities you should always wear

Correct Answer: C) Goggles and an apron.

9. What is the noble gas configuration for phosphorus?

Correct Answer: B) [Ne] 3s2 3p3.

10. The transfer of electrons occurs during

Correct Answer: A) Ionic bonding.

11. Human bone does not contain

Correct Answer: A) Oxygen.

12. A bromine (Br) atom has ..... valence electrons

Correct Answer: D) Seven.

13. Oxygens atomic number is 8. this means that an oxygen atom has

Correct Answer: C) 8 protons.

14. A charged atom that has gained or lost electrons is known as a(n) .....

Correct Answer: A) Ion.

15. Who isolated oxygen gas, which he called "dephlogisticated air" by heating mercury oxide (HgO)?

Correct Answer: C) Joseph Priestly.

16. How many atoms are present in 46 u of Na

Correct Answer: D) 2.

17. Which region of an atom has a negative charge?

Correct Answer: D) The electron cloud.

18. An acid is a molecule that releases (donates) .....

Correct Answer: A) Protons (hydrogen ions).

19. Petroleum is found in?

Correct Answer: C) Sedimentary rocks.

20. How many joules are required to boil 75 grams of water?

Correct Answer: A) 25050J.