TEAS 7 Chemistry Practice Questions - Multiple Choice

Which of the following bond types is responsible for the cohesion and adhesion of water?

A. covalent bonds

B. ionic bonds

C. hydrogen bonds

D. disulfide bonds

C. hydrogen bonds

Hydrogen bonds form between water molecules that causes cohesion and adhesion

Which of the following is the conjugate base of the strong acid HCl?

A. Cl-

B. NaCl

C. H2O

D. H+

A. Cl-

Hydrogen is super acidic so that wouldn't be the base

Chlorine would be the weak base

Which of the following is defined as the direct transition of substance from a solid state to a gas state?

A. melting

B. sublimation

C. deposition

D. recombination

B. sublimation

C is the opposite - gas to solid

Which of the following properties is categorized as an intensive property of a substance?

A. color

B. mass

C. volume

D. length

A. color

Intensive doesn't change based on how much of the substance you have

All the others would be classified as an extensive property

An atom in which of the following groups on the periodic table will most likely lose electrons when it forms an ionic bond with another atom?

A. group VIIIA

B. group VIA

C. group IIA

d. group VIIA

C. group IIA

Because group 2 only has 2 valence electrons, to have their outermost shell filled (to be stable), it would have to give up those 2 or gain 6 electrons

Which of the following it a physical change?

A. cooking an egg

B. breaking a piece of glass

C. burning a piece of wood

D. rusting metal

B. breaking a piece of glass

Because the glass was simply broken while all of the other underwent chemical changes

Which of the following phase changes requires heat (energy) to be absorbed?

A. deposition

B. sublimation

C. condensation

D. freezing

B. sublimation

An atom of zinc has an atomic number of 30 and an atomic mass of 65 amu. How many neutrons are in the nucleus of the atom?

A. 30

B. 65

C. 95

D. 35

D. 35

65-30=35

SiO2 + ____C -> SiC + ____CO

A. 5,4

B. 2,3

C. 3,2

D. 4,3

C. 3,2

3 carbon, 2 oxygen

Which of the following shows the correct products for a balanced single replacement reaction using the reactants below?

2AlPO4 + 3Mg ->

A. 2AlMg + 2PO4

B. Al2Mg3 + 2PO4

C. 2Al + Mg3(PO4)3

D. 2Al + Mg3(PO4)2

D. 2Al + Mg3(PO4)2

What type of reaction is shown below?

HBr + KOH -> Kbr + H2O

A. neutralization

B. synthesis

C. single replacement

D. combustion

A. neutralization

We yield an ionic compound H2O, sometimes CO2

An atom has an atomic number of 28 and an atomic mass of 59 amu. How many protons does it have in its nucleus?

A. 87

B. 59

C. 31

D. 28

D. 28

Protons - definition of atomic number

Which of the following substances is not water soluble?

A. sucrose

B. KCl

C. C8H10

D. fructose

C. C8H10

fructose and sucrose contain polar covalent bonds which would dissolve in water

KCl is an ionic salt which would dissolve in water

Hydrocarbons contain nonpolar covalent bonds - long chain of carbons surrounded by hydrogens

the nonpolar covalent bonds do not dissolve in water

Which of the following elements has the highest electronegativity?

A. Sodium

B. Calcium

C. Aluminum

D. Chlorine

D. Chlorine

Electronegativity is the tendency of an atom to attract electrons to itself

Electronegativity increases on the periodic table from left to right, and generally decreases from top to bottom

Which of the following compounds contains and ionic bond?

A. H2O

B. CO2

C. KBr

D. NH2

C. KBr (Potassium Bromide)

Ionic bond forms between a metal and a non mental

Covalent bond forms between two non metals

Of the following pH values, which is the most basic?

A. 3.6

B. 4.1

C. 6.5

D. 6.8

D. 6.8

7 is neutral, the closer to 14 the more basic the pH