SAT Chemistry Online Practice Test 5: Part D

Test Information

Question 16 questions

Time 10 minutes

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Directions: Every question below contains two statements, I in the left-hand column and II in the right-hand column. For each question, decide if statement I is true or false and whether statement II is true or false, and fill in the corresponding T or F ovals on your answer sheet. *Fill in oval CE only if statement II is a correct explanation of statement I.

1. According to the Kinetic Molecular Theory, the particles of a gas are in random motion above absolute zero
BECAUSE
the degree of random motion of gas molecules varies inversely with the temperature of the gas.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

2. An electron has wave properties as well as particle properties
BECAUSE
the design of a particular experiment determines which properties are verified.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

3. The alkanes are considered a homologous series
BECAUSE
homologous series have the same functional group but differ in formula by the addition of a fixed group of atoms.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

4. When an atom of an active metal becomes an ion, the radius of the ion is less than that of the atom
BECAUSE
the nucleus of an active metallic ion has less positive charge than the electron "cloud."

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

5. When the heat of formation for a compound is negative, ΔH is negative
BECAUSE
a negative heat of formation indicates that a reaction is exothermic with a negative enthalpy change.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

6. Water is a polar substance
BECAUSE
the sharing of the bonding electrons in water is unequal.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

7. A catalyst accelerates a chemical reaction
BECAUSE
a catalyst lowers the activation energy of the reaction.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

8. Copper is an oxidizing agent in the reaction with silver nitrate solution
BECAUSE
copper loses electrons in a reaction with silver ions.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

9. The rate of diffusion (or effusion) of hydrogen gas compared with that of helium gas is 1 : 4
BECAUSE
the rate of diffusion (or effusion) of gases varies inversely as the square root of the molecular mass.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

10. A gas heated from 10°C to 100°C at constant pressure will increase in volume
BECAUSE
as Charles's Law states, if the pressure remains constant, the volume varies directly as the absolute temperature varies.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

11. The Gibbs free-energy equation can be used to predict the solubility of a solute
BECAUSE
the solubility of most salts increases as temperature increases.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

12. The complete electrolysis of 45 grams of water will yield 40 grams of H2 and 5 grams of O2
BECAUSE
water is composed of hydrogen and oxygen in a ratio of 8 : 1 by mass.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

13. 320 calories or 1.34 × 103 joules of heat will melt 4 grams of ice at 0°C
BECAUSE
the heat of fusion of water is 80 calories per gram or 3.34 × 102 joules per gram.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

14. When 2 liters of oxygen gas react with 2 liters of hydrogen completely, the limiting factor is the volume of the oxygen
BECAUSE
the coefficients in balanced equations of gaseous reactions give the volume relationships of the envolved gases.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

15. Water is a good solvent for ionic and/or polar covalent substances
BECAUSE
water shows hydrogen bonding between oxygen atoms.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE

16. Ammonia gas, NH3, has a smaller density than argon gas, Ar, at STP
BECAUSE
the density of a gas at STP is found by dividing the molar mass by 22.4 liters.

A. T,T
B. T,F
C. F,T
D. F,F
E. T,T,CE