Question 1

Which of the following is NOT a chemical property of a substance?

Accepted Answer

It has a yellow-orange color.

Question 2

Which equation correctly represents the combustion of ethanol ($$\mathrm{C_2H_5OH}) in $$oxygen?

Accepted Answer

$$\mathrm{2\ C_2H_5OH\ (g) + 3\ O_2$\ (g) \rightarrow 2\ CO_2$\ (g) + 4\ H_2O\ (g)}$$

Question 3

Which of the following is a chemical property of hydrogen gas?

Accepted Answer

It reacts explosively with oxygen gas.

Question 4

A scientist observes that a metal rusts when exposed to pure oxygen gas. This observation is best described as:

Accepted Answer

A chemical property.

Question 5

Which of the following properties is most useful for identifying a chemical change?

Accepted Answer

Formation of a new substance.

Question 6

Which of the following is an example of a chemical property relevant to medical diagnostics?

Accepted Answer

The toxicity of a substance to living cells.

Question 7

Which property would NOT be classified as a chemical property?

Accepted Answer

Density.

Question 8

A student mixes two clear solutions and observes the formation of a precipitate. This is evidence of:

Accepted Answer

A chemical change.

Question 9

Which of the following best describes the chemical property of reactivity?

Accepted Answer

The ability of a substance to undergo a chemical reaction with another substance.

Question 10

Which of the following scenarios involves a chemical property being tested?

Accepted Answer

Observing the reaction of a metal with acid.

Question 11

Which property is most important when considering the safe storage of chemicals in a laboratory?

Accepted Answer

Their chemical reactivity.

Question 12

Which of the following is a chemical property that can be used to distinguish between sodium and potassium?

Accepted Answer

Their reactivity with water.

Question 13

A compound is described as toxic and highly reactive. These descriptions refer to:

Accepted Answer

Chemical properties.

Question 14

Which of the following is a chemical property that is important in nuclear medicine?

Accepted Answer

Radioactivity.

Question 15

Which of the following is a chemical property of iron?

Accepted Answer

It rusts when exposed to oxygen and water.

Question 16

Which of the following is a chemical property that can be used to identify an unknown element?

Accepted Answer

Its reactivity with acids.

Question 17

Which of the following is an example of a chemical property relevant to environmental science?

Accepted Answer

The toxicity of a pollutant to aquatic life.

Question 18

Which of the following is NOT a chemical property?

Accepted Answer

Solubility in water.

Question 19

Which of the following best describes the chemical property of toxicity?

Accepted Answer

The ability of a substance to cause harm to living organisms.

Question 20

Which of the following is a chemical property that is important in food chemistry?

Accepted Answer

The reactivity of vitamin C with oxygen.

Chemical Properties: Definitions, Examples, and Applications

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