End-Of-Grade Practice 1: Question Preview (ID: 2199)

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All of the following are signs that a chemical change has taken place EXCEPT for:
a) light given off.
b) gas produced.
c) substance boils.
d) heat is given off or taken in.

Explain the difference between mixtures and compounds.
a) Mixtures are the products of a chemical change; compounds are the product of physical change.
b) Mixtures and compounds undergo both physical and chemical changes.
c) Mixtures are the products of a physical change; compounds are the product of chemical change.
d) There is no difference between mixtures and compounds.

This gas makes up over 65% of your body:
a) calcium
b) carbon
c) hydrogen
d) oxygen

A 7.0 g rock is dropped into a graduated cylinder containing 15.0 mL of water. The water level rises to 18.0. What is the volume of the rock?
a) 3.0 mL
b) 7.0 mL
c) 10.0 mL
d) 18.0 mL

In the periodic table, what is a group?
a) a horizontal row with similar properties
b) a vertical column with similar properties
c) a horizontal row without similar properties
d) a vertical column without similar properties

Oxides are compounds that always include
a) oxygen
b) halogens
c) carbon
d) acids

One special type of solution that is not a liquid, but a solid, includes metals such as bronze, brass, and stainless steel. These metals are called____.
a) universal solvents
b) atoms
c) elements
d) alloys

According to the periodic table, how many electrons does an uncharged element of oxygen have?
a) 16
b) 7
c) 8
d) 34

Iron and oxygen form iron oxide which is commonly called rust. Which of the following is a product in the reaction?
a) iron
b) oxygen
c) iron oxide
d) water

Which of the following numbers indicates an acidic pH value?
a) 14
b) 12
c) 7
d) 3

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