Chemical Equation Review Question Preview (ID: 29697)
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In general, an increase in temperature
a) increases the reaction rate
b) decreases the reaction rate
c) does not affect the reaction rate
d) acts as a catalyst
What type of reaction always releases energy?
a) endothermic
b) decomposition
c) exothermic
d) oxidation-reduction
How are reactions related to chemical bonds?
a) bonds in the reactants are broken, bonds in the products are formed
b) bonds in the products are broken, and bonds in the reactants are formed
c) bonds in both the reactants and products are broken
d) bonds are formed in both the reactants and the products
What particle is transferred from one atom to another reaction in a redox reaction?
a) electron
b) proton
c) neutron
d) nucleus
In what type of reaction does one reactant form two or more products?
a) sythesis
b) single replacement
c) decomposition
d) double replacement
CH4 + O2 --) CO2 + H2O
a) Synthesis
b) Combusition
c) Single displacement
d) Double displacement
Which of the following is a statement of the law of conservation of mass?
a) mass is not created but destroyed
b) mass is destroyed but not created
c) mass is neither created nor destroyed.
d) mass is both created and destroyed depending on the chemical reaction.
AB --) A + B
a) Synthesis
b) Decomposition
c) Single displacement
d) Double displacement
AB + C --) AC + B is what type of reaction?
a) synthesis
b) decomposition
c) single displacement
d) double displacement
AB + CD --) AD + CB is what type of reaction?
a) Combustion
b) decomposition
c) single displacement
d) double displacement
Which pair has the same electron charge?
a) Cl- and Br
b) Cl and Br
c) Cl- and Br-
d) Cl+ and Br
When two flourine atoms share a pair of electrons, the bond that forms is a(n)
a) polar covalent bond
b) ionic bond
c) covalent bond
d) a sweet bond
The charge on a chloride ion in AlCl3 is (the 3 should be a subscript)
a) 1+
b) 1-
c) 3+
d) 3-
When an atom loses an electron, it forms a(n)
a) anion (negative)
b) polyatomic ion
c) cation (positive)
d) neutral atom
The substances that undergo a change in a chemical reaction are called
a) atoms
b) bonds
c) reactants
d) products
The new substances that are formed as a result of the chemical reaction are called
a) atoms
b) bonds
c) reactants
d) products
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