Chapter 2, Problem 1KSP

Interpretation Introduction

Interpretation: The correct name of the compound ${\text{CaSO}}_{\text{4}}$ is to be determined.

Concept Introduction:

Ionic compound contains cations and anions.

In ionic compounds, the sum of positive ions gets cancelled with sum of negative ions.

Combination of two or more atoms in an ion is known as polyatomic ion.

Ionic compounds are named using the name of cation and omitting the word ion followed by the name of the anion and omitting the word ion from it.

Answer to Problem 1KSP

Correct answer: Calcium sulfate. The correct answer is option (d).

Explanation of Solution

Reasons for the correct option:

The compound ${\text{CaSO}}_4$ contains a polyatomic sulfate ion.

Here, cation is calcium and the anion is sulfate. So, the name of the compound is calcium sulfate.

Hence, option (d) is correct.

Reasons for the incorrect option:

Option (a) is incorrect because ${\text{SO}}_4^{2-}$ is the polyatomic ion and known as sulfate, it cannot be known as sulfoxide. So, it is a wrong answer

Option (b) is incorrect because ${\text{SO}}_4^{2-}$ is the polyatomic ion and known as sulfate, it cannot be known as sulfite. So, it is a wrong answer.

So, it is a wrong answer.

Option (c) is incorrect because ${\text{SO}}_4^{2-}$ is the polyatomic ion and known as sulfate, it cannot be known as sulfur oxide. So, it is a wrong answer.

Option (e) is incorrect because ${\text{SO}}_4^{2-}$ is the polyatomic ion and known as sulfate, it cannot be known as sulfide tetroxide. So, it is a wrong answer.

So, it is a wrong answer.

Hence, options (a), (b), (c) and(e) are incorrect.