2019 1st Semester Review Part 3 Question Preview (ID: 49266)


Part 3 Of My Semester Review. TEACHERS: click here for quick copy question ID numbers.

The boiling point of chlorine is -34.6 degrees Celsius. This means that at room temperature chlorine is a ?
a) Solid
b) Liquid
c) Gas
d) Plasma

In order for a liquid to change states into a solid
a) energy must be added
b) the temperature must be constant
c) energy must be removed
d) none of the above

A physical change is NOT which of the following
a) a) An irréversible change
b) b) a change to shape or texture
c) c) a change to its state of matter
d) d) a change that maintains the substances chemical identity

Evidence of a chemical change taking place is NOT which of the following
a) a) forms new gas bubbles and changes colors
b) b) gives off heat, light, or combusts
c) c) freezing, melting or boiling
d) d) develops a new solid formation (precipitate) such as a powder or crystals

An Acid would have a PH of which of the following?
a) 4
b) 7
c) 10
d) 7.5

A Base would have a PH of which of the following?
a) 4
b) 7
c) 10
d) 6.5

A water would have a PH of which of the following?
a) 4
b) 7
c) 10
d) 2

What is a pure substance made of 2 or more elements that are combined chemically is called?
a) compound
b) mixture
c) element
d) solid

Pizza is an example of?
a) mixture
b) compound
c) element
d) liquid

Air is an example of?
a) compounds
b) homogeneous mixture
c) heterogeneous mixture
d) element

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