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