Question

Which of the following compounds is formed by covalent bonding?

• A. \( \text{NaCl} \)
• B. \( \text{H}_2\text{O} \)
• C. \( \text{Na}_2\text{O} \)
• D. \( \text{KCl} \)

Hint:

Covalent bonds are formed between two nonmetals, while ionic bonds are formed between a metal and a nonmetal.

Answer 1

The Correct Option is B

Step 1: Understand the types of bonding Covalent bonds are formed when two nonmetals share electrons. Ionic bonds, on the other hand, are formed between a metal and a nonmetal, where electrons are transferred. Step 2: Analyze the compounds - \( \text{NaCl} \) and \( \text{KCl} \) are ionic compounds because they are formed between a metal (Na or K) and a nonmetal (Cl). - \( \text{Na}_2\text{O} \) is also an ionic compound, formed between the metal Na and the nonmetal O. - \( \text{H}_2\text{O} \), however, is a covalent compound, formed by sharing electrons between two nonmetals (hydrogen and oxygen). Answer: Therefore, \( \text{H}_2\text{O} \) is formed by covalent bonding. So, the correct answer is option (2).