Chemical Classification
10 Questions
| Attempts: 1387
.
Questions and Answers
- 1.Which of the following are examples of matter? Check all that apply.
- A.
Sound
- B.
Water
- C.
Air
- D.
Heat
- E.
Energy
- 2.Which of these substances are elements? Check all that apply.
- A.
Iodine
- B.
Quartz
- C.
Water
- D.
Silicone
- E.
Lead
- F.
Silicon
- 3.Which of the following are mixtures? Check all that apply.
- A.
Salt water
- B.
Water (H2O)
- C.
Salt (NaCl)
- D.
Air (mostly N2 and O2)
- 4.Identify the pure substances in the following list. If there is more than one answer, select all that apply.
- A.
Whole blood
- B.
Table salt (NaCl)
- C.
Gold (Au)
- D.
Alcoholic drink
- E.
Air (mostly N2 and O2)
- F.
Saline solution
- G.
Ethanol (CH3CH2OH)
- H.
Elemental oxygen
- 5.Select the statements that pertain to elements. Select all the statements that apply.
- A.
These cannot be broken down by chemical means
- B.
These can be broken down by physical means
- C.
These are pure substances
- D.
These combine chemically to form new substances; they are building blocks of matter
- E.
These are chemical combinations of simpler forms of matter
- 6.Compounds must contain at least two elements.
- A.
True
- B.
False
- 7.Elements cannot be broken down further by processes such as boiling.
- A.
True
- B.
False
- 8.Compounds may be broken down into simpler substances through chemical processes.
- A.
True
- B.
False
- 9.Elements are pure substances whereas compounds are mixtures.
- A.
True
- B.
False
- 10.A compound is a physical mixture of simpler substances.
- A.
True
- B.
False
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