Chapter 9, Problem 67A

Interpretation Introduction

Interpretation: From the given compounds binary ionic compounds is to be identified.

Concept Introduction: Binary ionic compounds are ionic compounds comprised of two different types of elements. They are formed when two monoatomic ions bind together by the electrostatic force of attraction.

Answer to Problem 67A

KBr and sodium nitride is the binary ionic compounds among the given compounds. Hence, options a and c are correct.

Explanation of Solution

The compound KBr contains only potassium ions and bromide ions and sodium nitride $\left({\text{Na}}_{\text{3}}\text{N}\right)$ , contains only sodium ions and nitride ions. So, they are binary compounds.

Thus, options a and c are correct.

Conclusion

All the other compounds contain polyatomic ions, So, ${\text{K}}_{\text{3}}{\text{PO}}_{\text{4}}$ and ${\text{CaSO}}_{\text{4}}$ are not binary compounds.

Thus, options b and d are incorrect.