Chemistry Part 2 Unit Exam

Which of the following elements can never be found alone in nature?

• Helium

• Sulfur

• Aluminum

• Silver

Which of the following elements need a subscript of 2 if they are alone in a chemical reaction?

• Magnesium

• Oxygen

• Aluminum

• Copper

Which of the following elements need a subscript of 2 if they are alone in a chemical reaction?

• Sodium

• Nitrogen

• Potassium

• Nickel

What is the pH of a neutral solution?

• 0

• 7

• 14

• 10

Which of the following students are not following proper lab safety?

• Priest is wearing safety goggles

• Kealie has her hair tied back in a ponytail

• Chelsea has placed the test tubes pointing away from her and her peers during a chemical reaction

• Cole is throwing a bottle of HCl to Jaidisen across the room

Which of these students is not following lab safety protocols?

• Alex is wearing a lab coat

• Jordan is eating a snack in the lab

• Taylor is wearing goggles even though they are not actively using chemicals

• Riley is cleaning up spills immediately

What are the ions released by an acid?

• H+

• OH-

• H-

• OH+

What are the ions released by a base?

• H+

• OH-

• H-

• OH+

What is the general formula for a single replacement reaction?

• A + B --> AB

• AB --> A + B

• A + BC --> B + AC

• AB + CD --> AD + CB

What is the general formula for a double replacement reaction?

• A + B --> AB

• AB --> A + B

• A + BC --> B + AC

• AB + CD --> AD + CB