Chemistry Quiz U2

Which correctly describes why ionic compounds have high melting points?

• They have weak intermolecular forces.

• They have strong covalent bonds.

• They have strong electrostatic forces between ions.

• They have low molecular weights.

Tags

NGSS.HS-PS2-4

What is the name of HNO₂ and why?

• Nitric acid, because it contains nitrogen.

• Nitrous acid, because it is a weak acid.

• Hydrochloric acid, because it is a strong acid.

• Sulfuric acid, because it contains sulfur.

Which element will have an electronegativity value greater than chlorine?

• Sodium

• Fluorine

• Oxygen

• Hydrogen

Which is a property of covalent compounds?

• High melting points

• Conduct electricity in solution

• Low boiling points

• Form crystal lattices

Tags

NGSS.HS-PS1-1

Which of these is an example of an intermolecular force?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Which property should the students test to find out which compound has the strongest intramolecular forces and why?

• Melting point, because higher melting points indicate stronger forces.

• Color, because it shows the type of bond.

• Solubility, because it indicates bond strength.

• Density, because it reflects molecular weight.

Tags

NGSS.HS-PS1-2

What is electronegativity?

• The ability of an atom to attract electrons in a bond.

• The energy required to remove an electron.

• The size of an atom.

• The number of protons in an atom.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which correctly describes the molecular structure of polypropylene carpet fibers, and explains why the material is good for making carpet?

• They are ionic, making them strong.

• They are metallic, making them conductive.

• They are covalent, making them durable.

• They are polar, making them water-resistant.

Tags

NGSS.HS-PS2-6

Which of the following is a type of intermolecular force?

• Covalent bond

• Ionic bond

• Van der Waals forces

• Metallic bond

Which pair contains an acidic compound?

• NaCl and H₂O

• HCl and NaOH

• HNO₂ and KOH

• CH₄ and O₂