Chemistry in Biology Chapter Test

When placing a packet of sugar into a cup of coffee, the sugar particles that are being dissolved would be categorized as what?

• solvent

• colloid

• suspension

• solute

What distinguishes a homogeneous mixture from a heterogeneous mixture?

• Homogeneous mixtures have uniform composition throughout

• Homogeneous mixtures never contain water

• Homogeneous mixtures have visible distinct parts.

• Homogeneous mixtures have 2 or more phases

A suspension is best described as?

• A permanent mixture

• A type of homogeneous mixture

• A type of solution

• A heterogeneous mixture where particles settle over time.

What happens when an acid dissolves in water?

• An acid absorbs water and becomes neutral.
• An acid releases oxygen when mixed with water.
• An acid releases hydrogen ions when dissolved in water.

• An acid forms a solid precipitate in water.

Tags

NGSS.MS-PS1-2

On the pH Scale, a basic solution or base has which of the following?

• pH greater than 7
• More hydrogen ions (H+) than hydroxide ions (OH-)

• pH equal to 7
• pH less than 7

What percentage of the human body is water?

• 25%

• 50%

• 70%

• 90%

Which of the following is an example of a heterogeneous mixture?

• salt water

• Concrete
• orange juice without pulp

• A chunky banana and chocolate smoothie from Fosters Freeze

What type of bonds hold water molecules together?

• Hydrogen bonds
• Van der Waals forces
• Covalent bonds
• Ionic bonds

In chemistry, a solution is defined as what?

• A homogeneous mixture of solute and solvent.
• A pure substance with no solute.
• A mixture that can be separated by filtration.
• Any mixture containing water

What type of mixture is paint classified as?

• Suspension
• A pure substance

• Colloid

• Homogeneous mixture