T/f Chemistry

Front 1

Diamond and graphite are both substances made up of carbon but have different properties BECAUSE they are composed of different isotopes.

Back 1

True, False

Front 2

Na and Cl form an ionic bond BECAUSE Cl donates an electron to Na.

Back 2

True, False

Front 3

AgCl will not dissolve in a concentrated NaCl solution BECAUSE The chloride ions from NaCl suppress the solubility of AgCl.

Back 3

True, True, CE

Front 4

Hydrogen and deuterium are different elements BECAUSE they have a different number of protons.

Back 4

False, False

Front 5

On the periodic chart, atomic radius increases from left to right BECAUSE the number of protons is increasing.

Back 5

False, True

Front 6

An element with an atomic number of X and mass number of N has N-X neutrons BECAUSE elements have more neutrons than protons.

Back 6

True, False

Front 7

Radioactive decay has a characteristic half life BECAUSE first order kinetics are found in radioactive decay.

Back 7

True, True, CE

Front 8

Sulfur chemically resembles oxygen BECAUSE they are in the same period.

Back 8

True, False

Front 9

A nonelectrolyte does not ionize in water BECAUSE the solution does not conduct electricity.

Back 9

True, True

Front 10

SO3 diffuses more slowly than CO2 BECAUSE it has smaller bond angles.

Back 10

True, True

Front 11

Hydrogen bonding is stronger between noble gases than small electronegative atoms such as flurine BECAUSE noble gases have a large dipole moment.

Back 11

False, False

Front 12

An electron in a 3s subshell may be excited to jump into the 3p BECAUSE the Heisenberg uncertainty principle states that one cannot know what orbital an electron is in.

Back 12

True, False

Front 13

A positive delta G tells you that the reaction is spontaneous BECAUSE entropy always decreases in an isolaated system

Back 13

False, False

Front 14

An increase in pressure in a closed container with an ideal gas leads to a decrease in volume BECAUSE pressure and volume are proportional.

Back 14

True, False

Front 15

An amphoteric species acts as either an acid or a base BECAUSE it contains both hydrophobic and hydrophilic regions.

Back 15

True, False

Front 16

An indicator will allow you to determine whether a solution is acidic or basic BECAUSE it will change colors in solutions with different pHs.

Back 16

True, True, CE

Front 17

The ideal gas law does not hold under low temperatures and high pressure BECAUSE interactions between particles cannot be neglected under these conditions.

Back 17

True, True, CE

Front 18

An increase in entropy leads to a decrease of randomness BECAUSE the lower energy state of ordered crystals has a high entropy.

Back 18

False, False

Front 19

Two electrons in the 2s subshell must have opposite spins BECAUSE the Pauli Exclusion Principle states that no two electrons in the same atom can have identical quantum numbers.

Back 19

True, True, CE

Front 20

Atom A with 7 valence electrons forms AB2 with atom B with two valence electrons BECAUSE B donates its electrons to fill the outer shell of A.

Back 20

False, True

Front 21

CO2 is able to sublimate at atmospheric pressure BECAUSE its liquid form is impossible to produce.

Back 21

True, False

Front 22

A gas is more random than a liquid BECAUSE entropy increases from gas to liquid.

Back 22

True, False

Front 23

A mixture of pure metals is called an alloy. The melting point of an alloy will be lower than either of the component metals BECAUSE the new bonds are weaker.

Back 23

True, True, CE

Front 24

A salt dissolved in an organic solvent will be a good electrical conductor BECAUSE salts will not dissolve appreciably in an organic solvent.

Back 24

False, True

Front 25

A super saturated solution of glucose in boiling water crystallizes as it cools BECAUSE the solubility increases as the temperature decreases.

Back 25

True, False

Front 26

In a second order reaction with respect to A, when you double [A], the rate is quadrupled BECAUSE the rate equation is r=k[A]2 for such a reaction.

Back 26

True, True, CE

Front 27

Ca is a neutral atom BECAUSE it has the same number of protons and electrons.

Back 27

True, True, CE

Front 28

Salt dissolved in water depresses the freezing point BECAUSE the solute particles interfere with ice crystal formation.

Back 28

True, True, CE

Front 29

Ionic bonds are always stronger than covalent bonds BECAUSE they only break when bombarded with electrons.

Back 29

False, False

Front 30

Substances with hydrongen bonding tend to have unusually low boiling points BECAUSE extra energy is necessary to break the hydrogen bonds.

Back 30

False, True

Front 31

A solution with a pH of 12 has a higher concentration of hydroxide ions than one with a pH of 10 BECAUSE [H+][OH-] must equal 10-14.

Back 31

True, True, CE

Front 32

Catalysts decrease the rate of a chemical reaction BECAUSE catalysts decrease the activation energy.

Back 32

False, True

Front 33

The most important factor in determining the chemical properties of an element is the number of electrons in the outermost shell BECAUSE the number of electrons in the outer shell determines the bonding characteristics of the element.

Back 33

True, True, CE

Front 34

NH3 is a Lewis base BECAUSE it can accept a proton.

Back 34

True, True

Front 35

An element (X) with an atomic number of 16 has 14 electrons in X2- BECAUSE two protons bind the two outermost electrons.

Back 35

False, False

Front 36

Bromine is a stronger oxidizing agent than chlorine BECAUSE it has a large atomic radius.

Back 36

False, True

Front 37

An exothermic reaction has a positive delta H BECAUSE heat must be added to the system for the reaction to occur.

Back 37

False, False

Front 38

Iron is an element BECAUSE it cannot be broken into smaller units and retain its physical and chemical properties.

Back 38

True, True, CE

Front 39

CCl4 is a nonpolar compound BECAUSE the dipole moments are canceled out.

Back 39

True, True, CE

Front 40

A basic solution has more hydrogen ions than an acidic solution BECAUSE pH is defined as the -log[H+].

Back 40

False, True

Front 41

Atomic radii, decrease down a group BECAUSE the higher the atomic number within a group, the smaller the atom.

Back 41

False, False

Front 42

When an ideal gas is cooled its volume will increase BECAUSE temperature and volume are proportional.

Back 42

False, True

Front 43

A 0.2M solution of carbonic acid is a weaker conductor of electricity than a 0.2M solution of HBr BECAUSE in solutions with the same concentration of solute molecules, H2CO3 is less dissociated than HBr.

Back 43

True, True, CE