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# Bond Polarity (Grade 10)

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## Bond Polarity

Instructions: The following questions require the use of a reference table that contains the electronegativities of different elements.

1.
Which of the following covalent bonds can be classified as being the least polar?
1. H-Cl
2. H-H
3. H-F
4. H-Br

2.
Which of the following ionic bonds has the greatest degree of polarity?
1. Li-O
2. Li-F
3. Na-Cl
4. Na-Br
3.
Which of the following types of bonds present in hydrogen bonding is most polar?
1. H-O
2. H-F
3. H-N
4. Both (a) and (b) are the most polar

4.
Based on considerations of bond polarity, how could the bonds in $C O_2$ be classified?
1. nonpolar covalent
2. ionic
3. polar covalent
4. none of the above
5.
The chemical formula for propanol is $C_3 H_7 OH$. The bond between which two atoms in this compound is least polar?
1. C-O
2. O-H
3. C-H
4. C-C

6.
Which of the following atoms, when bonded to an atom of fluorine, would produce a bond with the greatest degree of polarity?
1. sulfur
2. nitrogen
3. hydrogen
4. bromine
7.
What is the most likely electronegativity difference of a nonpolar covalent bond?
1. 1.2
2. 0
3. 0.8
4. 2.1

8.
Which of the following statements correctly describes how the bond polarity of NaCl compares to that of $H_2 S$?
1. It has a weaker bond polarity.
2. It has a stronger bond polarity.
3. They have equal bond polarities.
4. There is not enough information to answer this question.
9.
The C=S bond in $CS_2$ is more polar than the Cl-Cl bond in $Cl_2$ is.
1. True
2. False

10.
Explain why the bond between hydrogen and sulfur in $H_2 S$ is more polar than the bond between nitrogen and oxygen in $N O_2$ is.

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