True/False - Test Questions

Question 1

Hypotheses are not acceptable in the scientific method

Answer 1

F

Question 2

The presence of some error is a natural consequence of any measurement

Answer 2

T

Question 3

The terms mass and weight are identical

Answer 3

F

Question 4

The atomic number of an ion tells us the number of protons that are present

Answer 4

T

Question 5

If an atom gains one electron, it becomes an anion

Answer 5

T

Question 6

Cations ten to be formed from metal atoms, while anions are formed from non-metal atoms

Answer 6

T

Question 7

Six electrons shared between two atoms corresponds to a double bond

Answer 7

F

Question 8

As a rule, a polar substance will be a good solvent for polar solutes, and vice versa.

Answer 8

T

Question 9

One atomic mass unit is the same as one gram

Answer 9

F

Question 10

One mole of H2O contains a total of 6.02 x 10^23

Answer 10

T

Question 11

The law of conservation of mass sates that matter cannot be gained or lost during a chemical reaction

Answer 11

T

Question 12

Counting the number of moles on both the reactant and product sides of an equation is the first step in balancing the equation

Answer 12

F

Question 13

The density of hydrogen gas is lower than that of nitrogen gas if both are measured at STP

Answer 13

T

Question 14

Ionic compounds tend to have higher melting pints than molecular compounds

Answer 14

T

Question 15

A solution in equilibrium with undissolved solute is said to be unsaturated

Answer 15

F

Question 16

Colligative properties depend only on the concentration of solute particles, not on their identity

Answer 16

T

Question 17

Osmosis may be defined as the movement of a solvent through a semipermeable membrane from a region of higher solute concentration to one of lower solute concentration

Answer 17

T

Question 18

An aqueous solution containing a nonvolatile solute will boil above 100C at 1 atm pressure

Answer 18

T

Question 19

A reaction that leads to an increase in the entropy of the system is always spontaneous.

Answer 19

F

Question 20

In general, a liquid state will have a higher entropy than a solid state.

Answer 20

T

Question 21

A collision between reactant molecules which produces one or more product molecules is called an effective collision

Answer 21

T

Question 22

A catalyst increases the equilibrium constant for a reaction

Answer 22

F

Question 23

All Bronsted-Lowry bases must contain hydroixde.

Answer 23

F

Question 24

A pH of 0 is considered neutral

Answer 24

F

Question 25

A standard solution is a solution whose concentration is accurately known

Answer 25

T

Question 26

The conversion of Fe2+ ion to Fe3+ ion is an oxidation reaction

Answer 26

T

Question 27

A rechargeable battery can operate either as a voltaic cell or as an electrolytic cell

Answer 27

T

Question 28

Compared to the energy of chemical bonds, nuclear binding energy is very weak

Answer 28

F

Question 29

Isotopes with even number of protons and neutrons are generally more stable than those with odd numbers of these particles

Answer 29

T

Question 30

Commercial nuclear power plants use the fusion process to generate electrical energy

Answer 30

F

Question 31

Doubling the distance from a source of radioactivity will halve the radiation intensity

Answer 31

F