Assessment

What is the nature of the substances described in the table?

• They are ionic compounds and have high melting points.

• They are ionic compounds and have low melting points.

• They are covalent compounds and have low melting points.

• They are covalent compounds and have high melting points.

Which of the following statements BEST explain why covalent compounds do not conduct electricity when dissolved in water?

• Covalent compounds have lower melting point.

• Covalent compounds are weakly bonded

• Covalent compounds dissolve into molecules.

• Covalent compounds don’t dissolve in water since they are composed of non- polar molecules

Which of the following substances do exist in solid, liquid, or gas at room temperature and normal atmospheric pressure?

• I only

• II only

• I, II, III only

• I, II and IV only

Which of the following compound is ionic based on their chemical formula

• KCl

• HCl

• NH3

• C12H22O11

Which are TRUE about snowflakes?

• I and II only

• III and IV only

• I, II, and III only

• I, II, and IV only

. Which of the following is/are TRUE about voltaic cells as shown in the diagram?

• I only

• II only

• I and II only

• II and III only

Maria is working as a student assistant in their school Chemistry laboratory. Which of the following shows a direct application of knowledge about the properties of compounds as a student assistant in the Chemistry laboratory?

• I only

• II only

• I and II only

• III and IV only

Which of the following pair of elements will result in nonpolar covalent compound?

• Aluminum and Chlorine

• Phosphorous and Hydrogen

• Sulfur and Oxygen

• Sodium and Chlorine

What kind of substance is being represented by the structure below?

• metal

• nonmetal

• ionic compound

• covalent compound

Which of the following are the properties of covalent compounds?

• I and II only

• II and III only

• I, II, and III only

• I, III, and IV only