UNIT 2: CHAPTER 3-4 TEST

Question 1

Chemical Reaction

A chemical reactions occurs if:

Answer 1

Elements and compounds forming new substances

A change in colour or an odour occurs
* Energy is released or absorbed (heat, light or sound)
* A gas is produced (you see bubbling)
* A precipitate forms (a solid is produced from two liquid solutions)

Question 2

Chemical Equation

Answer 2

Statement of what occurs in a chemical reaction

Question 3

Reactants
Products
Catalyst

Answer 3

R: On left side of equation

P: On right side of equation

Question 4

Catalyst

Answer 4

Makes a chemical reaction occur faster without itself being consumed in the reaction

Question 5

Diatomic elements and more

Answer 5

F2, B2, H2, I2, O2, N2, C2, S8, P4

Question 6

Combustion

Answer 6

A chemical reaction in which a substance burns in oxygen to produce combustion products and often, a flame.

Question 7

Organic compound

Answer 7

A molecular compound that contains one or more carbon-carbon bonds and, often, one or more carbon-hydrogen bonds

Question 8

Complete combustion

Answer 8

Reaction of an element or compound with excess oxygen, producing only H2O(g) and CO2(g)

Question 9

Incomplete combustion

Answer 9

Reaction of an element or compound with insufficient oxygen

Produces Carbon monoxide (CO)(g) and soot (C)(s) which causes health hazards

Question 10

Burning splint: carbon, oxygen, hydrogen

Answer 10

Carbon: Put out the fire
Oxygen: Re-ignites fire
Hydrogen: Makes a pop sound

Question 11

Neutralization

Answer 11

A special case of double displacement reaction that produces water (a liquid
product)