Chemical Reactions 1: Question Preview (ID: 10596)

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substances that are formed in a reaction, after the arrow
a) products
b) reactants
c) synthesis
d) decomposition

Substances at the beginning of a reaction, before the arrow
a) reactants
d) products

A chemical that is used to SPEED up the rate of a reaction.
a) catalyst
b) endothermic
c) exothermic
d) inhibitor

Energy that is required to start a reaction
a) activation energy
b) light energy
c) chemical energy
d) inhibitor

30g of substance A + 50g of substance B form how many grams of new susbtance?
a) 80g
b) 50g
c) 1500g
d) 20g

Which of the following is NOT a sign of a chemical change?
a) change in state
b) change in color
c) gas is produced
d) precipitate forms

A solid that can form when 2 liquids react
a) precipitate
b) combustion
c) crystalline
d) amorphous

A chemical reaction that releases energy in the form of light or heat
a) exothermic
b) decomposition
c) replacement
d) endothermic

What type of reaction has 1 reactant and 2 or more products?
a) decomposition
c) synthesis
d) replacement

What type of chemical reaction has 2 or more reactants and only 1 product?
a) synthesis
c) replacement
d) decomposition

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