PROPERTIES OF PURE SUBSTANCE

What are the two (2) classes of matter?

• Atom and molecule

• Element and compound

• Plant and animal cells

• Pure Substance and mixture

Which is true regarding water?

• Compound of element

• Element of gases

• Mixture of gases

• Substances of gases

What is the difference between a substance and a mixture?

• Substance can be separated while mixture cannot be separated.

• Substance has many components while mixture has one only.

• Substance is heterogeneous while mixture is homogeneous.

• Substance is pure while mixture is impure.

To separate salt from water in a seawater mixture, what process is used?

• Condensation

• Distillation

• Evaporation

• Filtration

A gaseous material has a strong smell, evaporates quickly, particularly boils

at -33.34 ̊C and melts at -77.73 ̊C. This matter can be classified as ________.

• metal

• mixture

• solution

• substance

What can be inferred from the table?

• Liquid A is pure substance while Liquid B is a mixture.

• Liquid A is a mixture while Liquid B is a pure substance.

• Liquid A is an element while Liquid B is a substance.

• Both Liquids A and B are pure substance.

A pinch of bread was placed inside a test tube and heated until it became

blackish in color and released some gas. Which of the following statement/s

is/are true according to the given information?

• I only

• II & III

• II ONLY

• III & IV

Water boils at 100 ̊C and pure ethanol at 78 ̊C. Which of the statements are

TRUE about water and ethanol?

• I ONLY

• I, II & IV

• III ONLY

• I, III, AND IV

Sodium chloride dissolves in water very well. Which is NOT TRUE in the

following statements?

• Water is a pure substance.

• Sodium chloride is a pure substance.

• Dissolving sodium chloride with water produces a mixture.

• Dissolving sodium chloride with water produces a new substance.

Ana wants to compare the chemical properties of two substances. In doing it, he prepared two flasks containing the substances and labeled them Liquid A

and Liquid B. He monitored the boiling points of the liquids and found that

the boiling points were 100 ̊C for substance A and 110 ̊C - 112 ̊C for liquid B. How would you classify the two liquids?

• Liquid A is pure substance while Liquid B is a mixture.

• Liquids A and B contain two or more atoms that are chemically

  bonded.

• Liquid A has varying boiling points while liquid B has a fix boiling

  point.

• Liquid A maybe homogenous or heterogeneous but substance B is not.