Water and Van der Waals Forces

What element in a water molecule has a partial negative charge?

• Hydrogen

• Oxygen

What element in a water molecule has a partial positive charge?

• Hydrogen

• Oxygen

The bond that holds together the oxygen and hydrogen in a water molecule is what type of bond?

• Ionic

• Covalent

• Metallic

• Hydrogen

The bond that holds together water molecules weakly is what type of bond?

• Ionic

• Covalent

• Metallic

• Hydrogen

The charged ends of a water molecule are very strong charges.

• True

• False

What is cohesion?

• Two different substances attracting

• Two same substances attracting

• Attraction between any molecules

• None of the above

Which of the following is an example of cohesion?

• Gecko climbing a wall

• A liquid attracting to the sides of a graduated cylinder

• Water molecules attracting and forming beads

• All of the above

Which of the following is an example of adhesion?

• Water running through the veins of a tree

• Water attracting to form beads

• A "skin" forming on the surface of water for bugs to run across

• None of the above

What is a mixture?

• When two elements come together chemically

• When two substances come together physically

• When two substances join to form a new substances

• None of the above

What is a homogeneous mixture?

• A mixture that is nonuniform throughout

• A mixture that is uniform throughout

• A mixture that cannot be taken apart easily

• All of the above