Lesson: Chapter 10 — Chemical Bonds

10.5. Properties of ionic and covalent compounds 1 of 10 Reset answers

Clear all your answers?

This erases every answer in this set and starts you again at question one. Your score will be gone.

Type these four numbers to confirm:

Those numbers don't match. Look at them again and type them.

Yes, clear Keep them

Question 1

Carbon rods are placed in a beaker of common salt solution and then in a beaker of sugar solution, each wired through a bulb to a battery. In which case does the bulb light?

A The salt solution only B Neither of them C Both of them D The sugar solution only

The right answer is the one marked above.

The salt solution only. Common salt is ionic, so dissolving it releases ions that are free to move and carry the current.

Sugar is a covalent compound. It dissolves as whole, uncharged molecules, so there are no charged particles for the current to move and the bulb stays dark.

Answer the question to continue.