1. Are made up of two or more elements which are chemically combined. Water is an example of a compound which can be separated from each other through the process called electrolysis
a. Element
b. Chemical symbols
C. Substance
d. Mixture
2. Which of the following describes an element?
a. The simplest substance.
b. It can be broken down into other types.
c. It can be separated through a chemical process.
d. It is composed of two or more types of atoms
3. Which of the following statement is true about elements and compounds?
a. Are homogeneous in nature
c. Are commonly naturally occurring materials.
b. Are simplest form of matter
d. Can be broken down into simpler substances.
4. Which of the following is not an example of compound?
a. Ammonia
b. Hydrogen peroxide
C. Salt
d. Copper
5. Which of the statements correctly describes a compound?
a. Can be broken down into simpler types of matter by chemical means
b. Has unique properties that are different from the properties of its individual elements.
c. Composed of atoms of two or more elements that bond together.
d. Composed of two atoms that bond together.
6. The two classes of matter are
a. Element and compound
C. Atom and molecule
b. Substance and mixture
d. Boiling point and melting point
7. Which of the following is a property of a substance?
a. It has different boiling point
c. It has definite composition
b. It has portion seems not melting
d. It has two or more components
8. Which of the following is an example of a pure substance?
a. Water
b. Milk tea
c. Halo-halo
d. Ice cream
9. What is the difference between pure substance and mixture?
a. Mixture has many components while pure substance has only one.
b. Mixture can be separated into components while substance cannot be separated.
c. Mixture is heterogeneous while substance is homogeneous.
d. All of the above.
10. Which of the following is a physical property of a pure substance?
a. Have a uniform composition
c. It has different boiling point
b. It is heterogeneous matter
d. Some portions of it seem to be not melting



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