Physical Science Ch 6 Question Preview (ID: 2897)


Chemical Reactions. TEACHERS: click here for quick copy question ID numbers.

Which of these is not a sign of a chemcial reaction?
a) a gas is given off
b) the material dissolves
c) Heat is released
d) a color change occurs

The substance that is formed in a chemical reaction is called the
a) polymer
b) reactant
c) radical
d) product

A type of reaction that produces an increase in temperature is
a) endothermic
b) exothermic
c) covalent
d) nonpolar

Which of the following occurs when gasoline is burned?
a) New elements are formed
b) new atoms are formed
c) new molecules are formed
d) all of the choices

A synthesis reaction between magnesium (Mg) and oxygen (O2) might produce
a) Mg2
b) O4
c) MgO
d) MgCO2

What type of reaction is the following: CH4 + 2O2 = CO2 + 2H2O
a) synthesis
b) decomposition
c) combustion
d) single replacement

What type of reaction is the following: 2NH3 = N2 + 3H2
a) synthesis
b) decompostion
c) single replacement
d) double replacement

What type of reaction is the following: 2NaCl + H2SO4 = Na2SO4 + 2HCl
a) synthesis
b) combustion
c) single replacement
d) double replacement

What type of reaction is the following: Fe + S = FeS
a) synthesis
b) decomposition
c) single replacement
d) double replacement

What type of reaction is the following: 2Li + 2H2O = 2LiOH + H2
a) synthesis
b) decomposition
c) single replacement
d) double replacement

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