Chemical Reactions: Question Preview (ID: 29415)


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A reaction in which atoms of an element replace the atoms of a second element in a compound.
a) Single Replacement b) Double Replacement c) Combustion d) Synthesis
A new substance formed in a chemical reaction
a) Catalyst b) Product c) Reactant d) Heat
A starting substance in a chemical reaction
a) Catalyst b) Product c) Reactant d) Heat
A reaction that involves an exchange of positive ions between two compounds.
a) Single Replacement b) Double Replacement c) Decomposition d) Synthesis
An equation in which each side has the same number of atoms of each element
a) Catalyst b) Heat c) Balanced Equation d) Product
A reaction in which two or more substances react to form a single substance.
a) Single Replacement b) Double Replacement c) Synthesis d) Decompostion
A reaction in which an element or compound reacts with oxygen, often producing energy in the form of light.
a) Single Replacement b) Double Replacement c) Synthesis d) Combustion
A reaction in which a single compound is broken down into two or more products.
a) Single Replacement b) Synthesis c) Combustion d) Decomposition
A substance that speeds up a reaction without being used up.
a) Catalyst b) Heat c) Product d) Reactant
What does the triangle symbol in a chemical equation mean?
a) Heat is supplied to the reaction. b) A catalyst is needed. c) yields d) precipitate
Symbols used in equations, together with the explanations of the symbols, are shown below. Which set is correct?
a) (g), grams b) (l), liters c) (aq), dissolved in water d) (s), solid product
What are the coefficients that will balance the skeleton equation below? AlCl + NaOH = Al(OH) NaCl
a) hydrogen b) water c) oxygen d) carbon dioxide
In a combustion reaction, one of the reactants is ____.
a) 1, 3, 1, 3 b) 3, 1, 3, 1 c) 1, 1, 1, 3 d) 1, 3, 3, 1
Chemical equations must be balanced to satisfy ____.
a) the law of definite proportions b) the law of multiple proportions c) Avogadro’s principle d) the law of conservation of mass
Chemical reactions ____.
a) occur only in living organisms b) produce new substances c) only occur outside living organisms d) create and destroy atoms
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