Test: Chemical Reactions
Review for unit test.
- 1.
Which of the following is an example of a synthesis reaction?
- A.
Heating calcium carbonate strongly
- B.
Putting sodium into water to produce hydrogen gas and sodium hydroxide
- C.
Passing electricity through water
- D.
Heating mercuric oxide
- E.
Putting copper into oxygen to produce copper (II) oxide
Correct Answer
E. Putting copper into oxygen to produce copper (II) oxide -
- 2.
A double displacement chemical reaction is the
- A.
Exchange of two different atoms between two compounds.
- B.
Displacement of one element in a compound by another element.
- C.
Breaking up of a compound to produce two different elements.
- D.
Joining together of two elements to form a compound.
- E.
Absorption of heat in a chemical reaction.
Correct Answer
A. Exchange of two different atoms between two compounds. -
- 3.
An acid-base indicator is a substance that
- A.
Does not change colour when the pH of the test solution goes from 4 to 9.
- B.
Is always red in acid and green in base.
- C.
Is rare and can only be obtained as a specialized chemical.
- D.
Turns different colours in acids and bases.
- E.
Does none of these.
Correct Answer
D. Turns different colours in acids and bases. -
- 4.
The following list contains properties of common acids and bases in water. Which of these properties describe a base? 1. turns litmus blue 2. becomes clear/cloudy in phenolphthalein 3. feels slippery 4. tastes sour 5. reacts with chalk (calcium carbonate).
- A.
1 and 3 only
- B.
1, 2, 3, 4, and 5
- C.
1, 4, and 5 only
- D.
2 and 5 only
- E.
3 and 4 only
Correct Answer
A. 1 and 3 only -
- 5.
An acid with a pH of 3 is _____ times more acidic than an acid with a pH of 5.
- A.
Two
- B.
Ten
- C.
One hundred
- D.
One thousand
- E.
Ten thousand
Correct Answer
C. One hundred -
- 6.
Which of the following are correct concerning neutralization reactions? Neutralization reactions 1. produce water. 2. produce a salt. 3. are single displacement reactions. 4. have an acid and a base as reactants. 5. are synthesis reactions.
- A.
2, 4, and 5 only
- B.
1, 4, and 5 only
- C.
2, 3, and 4 only
- D.
1, 2, and 3 only
- E.
1, 2, and 4 only
Correct Answer
E. 1, 2, and 4 only -
- 7.
Which reaction among the following is NOT a neutralization?
- A.
H2SO4 + Ca(OH)2 --> CaSO4 + 2 H2O
- B.
Zn + 2 HCl --> ZnCl2 + H2
- C.
KOH + HCl --> KCl + H2O
- D.
HNO3 + NaOH --> H2O + NaNO3
- E.
2 Al(OH)3 +3 H2SO4 --> Al2(SO4)3 + 6 H2O
Correct Answer
B. Zn + 2 HCl --> ZnCl2 + H2 -
- 8.
XF2 is the formula of a metallic fluoride. The formula of the corresponding metallic oxide of X is
- A.
XO.
- B.
XO2.
- C.
XO4.
- D.
X2O.
- E.
X2O3.
Correct Answer
A. XO. -
- 9.
Which of the following polyatomic ions have names that end in "ate"? 1. ClO3- 2. OH- 3. PO43- 4. HCO32- 5. SO32-
- A.
2, 3, and 4 only
- B.
2, 3, and 5 only
- C.
1 and 5 only
- D.
1, 3, and 4 only
- E.
1, 2, 4, and 5 only
Correct Answer
D. 1, 3, and 4 only -
- 10.
When the following equation (for the production of rust) is balanced, the coefficients for Fe(OH)2 and O2 in order are: Fe(OH)2 + O2 + H2O ® Fe(OH)3
- A.
3, 2
- B.
4, 1
- C.
2, 3
- D.
2, 2
- E.
1, 4
Correct Answer
B. 4, 1 -
- 11.
Which of the following metals would displace aluminum in aluminum nitrate?i) copperii) goldiii) magnesiumiv) ironv) calcium
- A.
I, ii and v only
- B.
Ii, iv and v only
- C.
Iii and v only
- D.
I and iii only
- E.
V only
Correct Answer
C. Iii and v only -
- 12.
This acid is responsible for the pain felt from a stinging insect.
- A.
Formic acid
- B.
Sulfuric acid
- C.
Nitric acid
- D.
Acetylsalicylic acid
- E.
Citric acid
Correct Answer
A. Formic acid -
- 13.
Which of the following observations positively identifies an acid?
- A.
Solution turn pink in phenolphthalein
- B.
Red litmus paper stays red
- C.
The substance feels slippery
- D.
Blue litmus paper turns blue
- E.
Oxygen gas is produced when a metal is added
Correct Answer
B. Red litmus paper stays red -
- 14.
Which of the following is a physical change?
- A.
Silver tarnishing
- B.
Muffins baking
- C.
Fireworks igniting
- D.
Snow melting
- E.
Sodium chloride dissolved in water
Correct Answer
D. Snow melting -
- 15.
The reaction of solutions of ammonium phosphate and barium nitrate gives a precipitate of barium phosphate. The equation which best represents this statement is:
- A.
2(NH4)3PO4(s) + 3Ba(NO3)2(aq) --> Ba3(PO4)2(aq) + 6NH4NO3(s)
- B.
2(NH4)3PO4(aq) + 3Ba(NO3)2(aq) --> Ba3(PO4)2(s) + 6NH4NO3(aq)
- C.
2(NH4)3PO4(aq) + 3Ba(NO3)2(s) --> Ba3(PO4)2(s) + 6NH4NO3(aq)
- D.
2(NH4)3PO4(aq) + 3Ba(NO3)2(aq) --> Ba3(PO4)2(aq) + 6NH4NO3(aq)
Correct Answer
B. 2(NH4)3PO4(aq) + 3Ba(NO3)2(aq) --> Ba3(PO4)2(s) + 6NH4NO3(aq) -
- 16.
The major cause of acid precipitation from car exhaust is:
- A.
Hydrogen gas
- B.
Sulfur dioxides
- C.
Nitrogen oxides
- D.
Carbon monoxide
- E.
Carbon dioxide
Correct Answer
C. Nitrogen oxides -
- 17.
When a piece of Al is immersed in a solution of CuCl2, the result is
- A.
AlCl3 and CuCl2
- B.
Al(s) Cu(s) and Cl2(g)
- C.
AlCl3 and Cu(s)
- D.
CuCl2 and Al2
- E.
No reaction
Correct Answer
C. AlCl3 and Cu(s) -
- 18.
How many atoms of oxygen in 3 molecules of aluminum phosphate?
- A.
1
- B.
2
- C.
3
- D.
4
- E.
12
Correct Answer
D. 4 -
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Jan 09, 2013Quiz Edited by
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Dec 07, 2009Quiz Created by
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