HESI Chemistry Practice Test 2

Which of the following statements about most metals is false?

A) They are ductile

B) They are gases at room temperature

C) They make up the majority of elements on the periodic table

D) None of the above

Correct! Wrong!

Explanation:
Metals are generally solids at ambient temperature, whereas nonmetals are usually gaseous.

Using the Lewis-dot structure model, how many dots would carbon have?

2

8

6

4

Correct! Wrong!

Explanation:
The number of dots in a Lewis-dot structure model corresponds to the number of valance electrons for that atom. Because carbon has four valance electrons, it’s Lewis-dot structure model would have 4 dots.

Which of the following is true of gas particles?

They are generally stationary.

They exert little to no force on one another.

The distance separating particles is small.

They do not have mass.

Correct! Wrong!

Explanation:
Gas particles exert little to no force on each other, so they “bounce” off each other when they collide. The other options are all false regarding gas particles.

Which of the following is not a property of water?

High surface tension

High boiling point compared to other hydrogen compounds

Can absorb/release large quantities of heat without large temperature change.

Density of liquid form is less than solid form

Correct! Wrong!

Explanation:
This is the only answer choice that is not true, as the question asks.

Dihydrogen monoxide is better known as what?

Hydrogen peroxide

Iodine

Water

Table salt

Correct! Wrong!

Explanation:
Dihydrogen monoxide, or H₂O, is more commonly known as water.

What is the most abundant element in Earth’s crust?

Hydrogen

Oxygen

Carbon

Nitrogen

Correct! Wrong!

Explanation:
Oxygen makes up about 47% of the Earth’s mass, followed by Silicon at 28%, Aluminum at 8%, Iron at 5%, Calcium at 4%, and Sodium and Potassium, each at 3%.

The change in state from a gas to liquid is called what?

Vaporization

Disposition

Evaporation

Condensation

Correct! Wrong!

Explanation:
Condensation is the reverse of vaporization and can be observed when gas cools and becomes a liquid, such as when dew appears in the morning after the temperature drops at night.

What is the most abundant element in the universe?

Oxygen

Nitrogen

Hydrogen

Helium

Correct! Wrong!

Explanation:
Hydrogen is the most abundant element in the universe, followed by Helium and then Oxygen.

Which one of the following elements is liquid at room temperature?

Manganese

Magnesium

Mercury

Zinc

Correct! Wrong!

Explanation:
Mercury is the only element that is liquid at room temperature.

All of the following factors influence the pace of a chemical reaction except?

A) Presence of catalysts

B) Surface area

C) Amount of mass lost

D) Temperature

Correct! Wrong!

Explanation:
The pace of a chemical reaction is not affected by the quantity of mass lost since the law of conservation of mass (or matter) stipulates that there is no mass loss in a chemical reaction.

Which of the following would produce Hydrogen ions in an aqueous solution and would turn a litmus test from blue to red?

Vinegar

Ammonia

Lye

Detergent

Correct! Wrong!

Explanation:
Blue litmus paper turns red in the presence of an acid. Ammonia, lye, and detergent are basic, so they would not give off Hydrogen ions in an aqueous solution and when added to blue litmus paper the paper would remain blue.

Which of the following elements does not appear on the periodic table?

A) Chlorine

B) Bromine

C) Phosphorous

D) Magnesium oxide

Correct! Wrong!

Explanation:
Because it is a combination of two elements, magnesium oxide does not appear on the periodic table.

Reactions that absorb heat are called what?

Exothermic

Combustion

Endothermic

Thermal

Correct! Wrong!

Explanation:
Endothermic reactions absorb heat, while exothermic reactions give off heat.

Viscosity increases in what circumstance?

When carbon is introduced

None–viscosity is constant

Temperature decrease

Temperature increase

Correct! Wrong!

Explanation:
Viscosity, or the resistance of a fluid against force, increases with a temperature decrease, that is, fluid becomes more viscous (flows slower) in colder temperatures.

A solution that contains the maximum amount of dissolved solute is said to be what?

Dilute

Concentrated

Saturated

Unsaturated

Correct! Wrong!

Explanation:
A saturated solution is one that has the maximum amount of solvent dissolved into it.

Lisa prepares soup by combining spices in a saucepan of boiling water and stirring until the spices are completely dissolved. She then adds a variety of diced veggies. What is the solute in her mixture?

A) Spices

B) Heat

C) Water

D) Vegetables

Correct! Wrong!

Explanation:
A solute is a material that dissolves when it comes into contact with another substance. The spices are the solute in this situation.

HESI Chemistry Practice Test 2

Which of the following statements about most metals is false?

Using the Lewis-dot structure model, how many dots would carbon have?

Which of the following is true of gas particles?

Which of the following is not a property of water?

Dihydrogen monoxide is better known as what?

What is the most abundant element in Earth’s crust?

The change in state from a gas to liquid is called what?

What is the most abundant element in the universe?

Which one of the following elements is liquid at room temperature?

All of the following factors influence the pace of a chemical reaction except?

Which of the following would produce Hydrogen ions in an aqueous solution and would turn a litmus test from blue to red?

Which of the following elements does not appear on the periodic table?

Reactions that absorb heat are called what?

Viscosity increases in what circumstance?

A solution that contains the maximum amount of dissolved solute is said to be what?

Lisa prepares soup by combining spices in a saucepan of boiling water and stirring until the spices are completely dissolved. She then adds a variety of diced veggies. What is the solute in her mixture?

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