Chemistry Quiz 49 (20 MCQs)

Quiz Instructions

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1. If an atom is located in the 1st column of the periodic table, then a neutral atom has

Correct Answer: B) 1 valence electrons.

2. Which compound has the most atoms?

Correct Answer: C) C3H6O3.

3. Sugars are converted in the liver into

Correct Answer: B) Glycogen.

4. A ..... is the smallest chemical unit of matter. When these units all have the same number of protons, they are the same .....

Correct Answer: B) Atom, element.

5. What is the number of signifiant digits present in0.01025

Correct Answer: B) 4.

6. A H2O molecule is bonded by what kind of bond?

Correct Answer: C) Covalent.

7. What determines the order of placement of the elements on the modern Periodic Tables?

Correct Answer: A) Atomic number.

8. A chemical symbol always begins with a

Correct Answer: B) Capital letter.

9. What is a biological molecule?

Correct Answer: A) Organic molecule found in any organism.

10. Represents all the known elements .....

Correct Answer: A) Periodic table.

11. Which of these is a mixture?

Correct Answer: A) Laundry Detergent.

12. At what pH level would both Bromthymol blue and Bromcresol green be yellow?

Correct Answer: C) 3.

13. A solution that contains the maximum amount of solute that a given quantity of a solvent can dissolve

Correct Answer: D) Saturated solution.

14. A homogeneous mixture is a

Correct Answer: C) Solution.

15. Subatomic particles with a negative charge

Correct Answer: A) Electrons.

16. A substance will have stronger London dispersion forces if it has

Correct Answer: A) More electrons.

17. What does an enzyme do?

Correct Answer: C) Lowers the amount of activation energy needed for a reaction.

18. RNA stands for what?

Correct Answer: B) Ribonucleic acid.

19. What is the mass of one mole of potassium (K)?

Correct Answer: B) 39.10 grams.

20. Which of the following would be considered a combustion reaction?

Correct Answer: C) C3H8 + O2.