Chemistry Quiz on Ionic and Covalent Compounds

Why do covalent compounds not conduct electricity?

• They have free electrons.

• Electrons are shared in a covalent bond.

• They have mobile ions.

• They are always in a solid state.

When do ionic compounds conduct electricity?

• Only when solid.

• Only when in gaseous form.

• When molten or in aqueous solution.

• Only when mixed with covalent compounds.

What is an anion?

• A positively charged ion.

• A negatively charged ion.

• A neutral molecule.

• A type of covalent bond.

During electrolysis, where do positively charged ions move?

• To the positive electrode (anode).

• To the negative electrode (cathode).

• To the center of the solution.

• They remain stationary.

What is produced at the anode if the ionic compound contains halide ions?

• Hydrogen gas.

• Oxygen gas.

• The halogen.

• Water.

During the electrolysis of sodium chloride solution, which ions go to the cathode?

• Cl⁻ ions

• Na⁺ ions

• H⁺ ions

• OH⁻ ions

In the electrolysis of copper (II) sulfate solution, what is produced at the anode?

• Cu (s)

• H₂ (g)

• O₂ (g)

• Cl₂ (g)

What is the mnemonic used to remember oxidation and reduction?

• REDOX

• OILRIG

• LEO GER

• RIG OIL

Which of the following represents a reduction reaction at the negative electrode?

• X⁻ -> e⁻ + X

• X⁺ + e⁻ -> X

• X -> X⁺ + e⁻

• X -> X⁻ + e⁻

What is the anode made of in the electrolysis of copper sulfate solution using copper electrodes?

• Pure copper

• Impure copper

• Copper sulfate

• Pure silver