Q: Given the electronegativity values: $$O = 3.5$$, $$H = 2.1$$, what is the bond type and polarity of the $$O-H$$ bond in water?

Polar covalent; oxygen is $$[3m\delta^-[0m$$

Question 1

Which type of intermolecular force is primarily responsible for the unusually high boiling point of water ($$H_2O) $$compared to other molecules of similar size?

Accepted Answer

Hydrogen bonding

Question 2

Given the electronegativity values: $$O = 3.5$$, $$H = 2.1$$, what is the bond type and polarity of the $$O-H$$ bond in water?

Accepted Answer

Polar covalent; oxygen is $$[3m\delta^-[0m$$

Question 3

Which of the following compounds contains both ionic and covalent bonds?

Accepted Answer

$$NaNO_3$$

Question 4

What is the correct formula for the compound formed when aluminum reacts with iodine?

Accepted Answer

$$AlI_3$$

Question 5

Which of the following molecules is nonpolar, despite containing polar bonds?

Accepted Answer

$$CO_2$$

Question 6

Arrange the following substances in order of increasing boiling point: $$CH_4$$, $$HCl$$, $$H_2O$$, $$NaCl.$$

Accepted Answer

$$CH_4$$ \u003c HCl \u003c H_2O \u003c NaCl$$

Question 7

Which of the following best explains why oil and water do not mix?

Accepted Answer

Oil is nonpolar and water is polar; their intermolecular forces are incompatible.

Question 8

What is the strongest intermolecular force present in $$NH_3 ($$ammonia)?

Accepted Answer

Hydrogen bonding

Question 9

Which of the following statements about electronegativity is TRUE?

Accepted Answer

Fluorine is the most electronegative element.

Question 10

Which of the following compounds is most likely to dissolve in water?

Accepted Answer

$$NaCl$$

Question 11

What is the correct name for $$FeCl_3$$ using the IUPAC system?

Accepted Answer

Iron(III) chloride

Question 12

Which of the following best describes the molecular geometry and polarity of $$CH_4 ($$methane)?

Accepted Answer

Tetrahedral; nonpolar

Question 13

Which of the following bonds is the most polar?

Accepted Answer

$$O-H$$

Question 14

A molecule has a central atom with four regions of high electron density and two lone pairs. What is its molecular geometry?

Accepted Answer

Bent

Question 15

Which of the following best explains why $$H_2O is a $$polar molecule?

Accepted Answer

It has polar bonds and a bent molecular shape, so the dipoles do not cancel.

Question 16

Which of the following substances exhibits only dispersion forces as its strongest intermolecular attraction?

Accepted Answer

$$CCl_4$$

Question 17

What is the correct formula for the compound formed between calcium and fluorine?

Accepted Answer

$$CaF_2$$

Question 18

Which of the following best describes why $$CH_4 ($$methane) cannot form hydrogen bonds?

Accepted Answer

The hydrogen atoms are bonded to carbon, not to N, O, or F.

Question 19

Which of the following is the correct name for $$Al(OH)_3$$?

Accepted Answer

Aluminum hydroxide

Question 20

Which of the following statements about intermolecular forces is FALSE?

Accepted Answer

Hydrogen bonds are stronger than covalent bonds within a molecule.

Ionic and Covalent Bonding, Electronegativity, Molecular Polarity, and Intermolecular Forces

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