Unit 1 Investigating Matter Practice Test

A mystery solution has a pH of 6.5. Which of the following best describes the solution?

• The solution is a weak base

• The solution is a weak acid

• The solution is a strong base

• The solution is a strong acid

Which of the following statements about elements and compounds is accurate?

• Elements are many different types of atoms together but compounds are just one type of atom

• Elements are pure substances that cannot be broken down physically but compounds are pure substances that can be broken down physically

• Elements are not found on the Periodic Table but compounds are found on the Periodic Table

• Elements are pure substances that cannot be broken down chemically but compounds are pure substances that can be broken down chemically

Which of the following is responsible for water forming a “dome” shape when it is poured onto a surface?

• Cohesion

• Adhesion

• Surface Tension

• Friction

How could you separate a mixture of sand and water?

• Pick out each sand grain

• Allow the water to evaporate

• Drink the water

• This mixture cannot be separated

Which of the following would be more acidic than hydrogen peroxide (pH=3)?

• Tomato juice

• Vinegar

• Soap

• Battery acid

Which of the following is a difference between acids and bases?

• Acids are corrosive and bases are not

• Acids have a pH less than 7 and bases have a pH greater than 7.

• Acids are able to conduct electricity and bases are not

• Acids have a bitter taste and bases have a sour taste

Which of the following correctly identifies the reason for taking an indigestion tablet for an upset stomach?

• The tablet helps to increase the acidity in the stomach

• The tablet helps to reduce the basicity in the stomach

• The tablet helps to speed up the digestive process

• The tablet helps to neutralize acid in the stomach

Identify which example represents a homogeneous mixture.

• air

• water

• steel

• salt and pepper

• sand

Which of the following does A represent?

• Element

• Compound

• Mixture of elements

• Mixture of compounds

• Mixture of elements and compounds

Which of the following does B represent?

• Element

• Compound

• Mixture of elements

• Mixture of compounds

• Mixture of elements and compounds