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Home Hesi A2 Chemistry Practice quiz

Hesi A2 Chemistry Practice quiz

BeniellaJune 19, 20251 Mins read

Welcome to your Hesi A2 Chemistry Practice quiz

1.

Which of the following describes a single covalent bond?

A bond that shares no electron pairs

A bond that shares a single proton

A bond that shares two electron pairs

A bond that shares one electron pair

None

1 out of 25

2.

Which of the following does pH measure?

The concentration of hydroxide ions

The strength of an acid

Acid concentration

The concentration of hydrogen ions

None

2 out of 25

3.

Which of the following correctly represents the general chemical formula of a carbohydrate?

(CH²O)n

(CH⁴O)n

(CHO)n

C⁶H¹²O⁶

None

3 out of 25

4.

Which of the following represents the general form of a decomposition reaction?

AB → A + B

AB + C → AC + B

A + O2 → H2O + CO2

AB + CD → AD + BC

None

4 out of 25

5.

The mass of a grain of sand is 1.672 × 10-4 kg. Express this number in standard notation.

1,672,000 kg

0.00001672 kg

1,672 kg

0.0001672 kg

None

5 out of 25

6.

Which of the following describes a catalyst?

A solid that precipitates out of a reaction

A substance that increases the rate of a chemical reaction

A gas that evolves from the reaction

A substance that slows down a reaction.

None

6 out of 25

7.

Which of the following is the SI unit used to measure the amount of a substance?

Meter

Mole

Kilogram

Gram

None

7 out of 25

8.

Which of the following pH values is acidic?

7

13

5

11

None

8 out of 25

9.

What type of bonding exists in NaCl?

Isotopic

Ionic

Synthetic

Stoic

None

9 out of 25

10.

How many total amino acids are needed for the human body to produce all the proteins it needs?

9

20

11

10

None

10 out of 25

11.

How many days will it take 128 kilograms of a radioactive substance to decay to 16 kilograms if it has a half-life of 32 days?

48

3

4

96

None

11 out of 25

12.

Which of the following states of matter take the shape of the container they are placed in?

Liquid and gas

Liquid and solid

Gas and solid

Gas, liquid, and solid

None

12 out of 25

13.

What is the name given to a negatively-charged atom?

Ion

Cation

Anion

Isotope

None

13 out of 25

14.

Which of the following is the correct term for chemicals on the left side of the reaction arrow?

Products

Ions

Equation

Reactants

None

14 out of 25

15.

Which of the following is not an intermolecular force?

Dispersion force

Metallic bond

Hydrogen bond

Dipole-dipole interaction

None

15 out of 25

16.

In a redox reaction, oxidation is the _______ of electrons and reduction is the _______ of electrons

loss, loss

gain, gain

gain, loss

loss, gain

None

16 out of 25

17.

Which of the following phase transition describes the change from ice into steam?

Sublimation

Melting

Freezing

Evaporation

None

17 out of 25

18.

Which of the following is not likely to have a dipole?

Ionic compound

Salt

Nonpolar compound

Polar compound

None

18 out of 25

19.

Which of the following correctly defines the term isotope?

Atoms with the same number of protons and electrons, but a different number of neutrons.

Atoms that have different numbers of neutrons, electrons, and protons.

Atoms that have the same number of protons and neutrons, but a different number of electrons.

Atoms with the same number of neutrons and electrons, but a different number of protons.

None

19 out of 25

20.

Which of the following is emitted during beta decay?

Nucleus

Electron

Neutron

Proton

None

20 out of 25

21.

Why does increasing the surface area of reactants or catalysts increase the rate of a reaction?

It reduces the amount of precipitate that is formed during the reaction.

The activation energy of the reaction is lowered.

It introduces charges on the surface of the particles, which makes them more reactive.

It increases the likelihood of molecules encountering one another.

None

21 out of 25

22.

Normal body temperature is considered to be 98.6oF. What is the normal body temperature in degrees Celsius?

36° C

21° C

37° C

32° F

None

22 out of 25

23.

What is the oxidation number of oxygen?

2 –

1 –

1 +

None

23 out of 25

24.

Which of the following is represented by the atomic number of an element?

An element’s number of neutrons

An element’s number of protons, neutrons, and electrons

An element’s number of protons and neutrons

An element’s number of protons

None

24 out of 25

25.

What is the percent concentration of benzene in a solution containing 59 mL of benzene and 150 mL toluene?

28.2 %

14.1 %

39.3 %

56.4 %

None

25 out of 25

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