Chapter U1.26, Problem 6E

Interpretation Introduction

Interpretation:

The true statement has to be selected.

Concept introduction:

There are four types of bonds in compounds:

1. Ionic bond
2. Molecular covalent bond
3. Metallic bond
4. Network covalent bond

Each type of bonding is responsible for a particular property of the substance. Some bonds are made of only metals, some only of nonmetals and some have both metals and nonmetals.

Answer to Problem 6E

Correct answer: ( E) All of the above are true.

Explanation of Solution

Reason for correct option:

(A)Aqueous solution of calcium chloride is an ionic compound. It will conduct electricity when dissolved in water as it forms ions which move freely in solution.

(B) Glass is made of silicon dioxide; both of which are nonmetals. So it has network covalent bonding. Such solids cannot dissolve in water.

(C)Ethanol is a molecular covalent substance with molecular covalent bonding because it is made of nonmetals and is a liquid. So it can dissolve in water but electrons are not free to conduct electricity.

(D)Brass is made of copper and zinc; both are metals. So it has metallic bonding and can conduct electricity as metals are good conductors of electricity. They have valence electrons which are free to move throughout the solid.

Conclusion

All the four statements (A, B, C and D) are true. So the correct option is E.