Chemical Reactions Practice Test

Question 1

The general formula for a ____________________ reaction is

AB->A+B

Answer 1

Decomposition

Question 2

Balancing a chemical equation so that the same number of atoms of each element is present both before and after the reaction is an illustration of

Answer 2

Conservation of matter/mass

Question 3

The general formula for a __________________ reaction is

A + B -> AB

Answer 3

Synthesis

Question 4

A bonfire is an example of a(n)_________________ reaction

Answer 4

Exothermic

Question 5

In which type of reaction do the parts of two compounds switch places

Answer 5

Double replacement

Question 6

A(n) ____________ lowers activation energy

Answer 6

Catalyst

Question 7

The matter present after a reaction takes place is called a(n)

Answer 7

Product

Question 8

One indicator of a chemical reaction is

Answer 8

Gases forming

Question 9

One indicator of a chemical reaction is

Answer 9

Gases forming

Question 10

In the formula H O the 2 is a

Answer 10

Subscript

Question 11

When an atom loses e- a(n) __________________ is formed

Answer 11

Ion

Question 12

Any substance that enters into a chemical reaction is called a(n)

Answer 12

Reactant

Question 13

A chemical reaction where an uncombined element replaces an element that is part of a compound is called a(n). __________________ reaction.

Answer 13

Single replacement

Question 14

An increase in temp. Will usually cause the rate of reaction to increase

Answer 14

Increase

Question 15

An ionic bond is formed when electrons are

Answer 15

Exchanged

Question 16

If there is a chemical reaction and energy is released the reaction is called a(n)

Answer 16

Exothermic

Question 17

As a result of an endothermic chemical reaction energy is

Answer 17

Absorbed

Question 18

When a chemical reaction occurs, there is always a change in

Answer 18

Energy

Question 19

Hand warmers are an example of a(n)

Answer 19

Exothermic reaction