Among the given options, the variable charge metal has to be chosen. Concept Introduction: An ionic compound has two elements one is metal and another one is non-metal. The metal ion always has positive charge and the non-metal ion always has negative ion called binary compounds. Example: NaCl, CO 2 . Here NaCl is ionic and carbon dioxide is binary compound. Depending upon the chemical circumstances metal atoms are able to form more than one type of ion is called variable charge metal. Example – Fe forms Fe 2+ and Fe 3+ ion.

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Chapter 4.9, Problem 5QQ

Interpretation Introduction

Interpretation:

Among the given options, the variable charge metal has to be chosen.

Concept Introduction:

An ionic compound has two elements one is metal and another one is non-metal. The metal ion always has positive charge and the non-metal ion always has negative ion called binary compounds.

Example: NaCl, CO2. Here NaCl is ionic and carbon dioxide is binary compound.

Depending upon the chemical circumstances metal atoms are able to form more than one type of ion is called variable charge metal.

Example – Fe forms Fe2+ and Fe3+ ion.

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