Which of the following compounds is an example of a polar covalent bond?

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Question: Which of the following compounds is an example of a polar covalent bond?

Options:

Correct Answer: HCl

Solution:

HCl has a polar covalent bond due to the difference in electronegativity between hydrogen and chlorine.

Which of the following compounds is an example of a polar covalent bond?

Which of the following compounds is an example of a polar covalent bond?

Step 1: Understand what a covalent bond is. A covalent bond is formed when two atoms share electrons.
Step 2: Learn about electronegativity. Electronegativity is a measure of how strongly an atom attracts electrons.
Step 3: Identify the atoms in the compound HCl. HCl consists of hydrogen (H) and chlorine (Cl).
Step 4: Look up the electronegativity values for hydrogen and chlorine. Hydrogen has an electronegativity of about 2.1, and chlorine has an electronegativity of about 3.0.
Step 5: Calculate the difference in electronegativity between chlorine and hydrogen. The difference is 3.0 - 2.1 = 0.9.
Step 6: Determine if the bond is polar. A bond is considered polar if the difference in electronegativity is between 0.4 and 1.7. Since 0.9 falls within this range, HCl has a polar covalent bond.

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