Pure Substances and Mixtures

Compounds that contain hydrogen and oxygen are called organic compounds.

• TRUE

• FALSE

Pure substances cannot be separated physically.

• TRUE

• FALSE

Milk and gelatin are examples of solution.

• TRUE

• FALSE

A substance that is made up of a single kind of atom is called ___________________.

• element

• solution

• mixture

• compound

Which of the following is not a heterogenous mixture?

• colloid

• solution

• suspension

Air is a/an _________________.

• atom

• element

• compound

• mixture

Red litmus paper turns into blue in the presence of a/an _________________.

• acid

• base

• neutral substance

• pure substance

Which of the following is a mixture?

• Salt (NaCl)

• Flourine (Fl)

• Hydrogen (H)

• salad

Which of the following is an element?

• Salt (NaCl)

• Water (H2O)

• Nitrogen (N)

• Carbon dioxide (CO2)

Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

• pure

• heterogeneous

• homogeneous

• suspension