Reaction Types, Acids & Redox

29 questions · Answers revealed below each question · Print this set

1.Which isotope do most nuclear power stations split?
- A. Carbon-12
- B. Hydrogen-2
- C. Uranium-235
- D. Helium-4
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Uranium-235
Did you know? Uranium-235 is the fissile staple of commercial reactors.
2.In respiration, which molecule is reduced to water?
- A. Glucose
- B. Oxygen
- C. Nitrogen
- D. Carbon dioxide
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Oxygen
Did you know? Respiration reduces oxygen to water while oxidizing glucose.
3.What is the approximate pH of household bleach?
- A. About 12
- B. About 6
- C. About 3
- D. About 5
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About 12
Did you know? Bleach is strongly alkaline, near pH 12.
4.In a zinc-copper battery, which metal dissolves as the anode?
- A. Silver
- B. Zinc
- C. Copper
- D. Iron
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Zinc
Did you know? Zinc gives up electrons at the anode and dissolves into ions.
5.How does a catalyst lower the barrier for a reaction?
- A. By consuming the reactants
- B. By lowering the activation energy
- C. By adding energy to the products
- D. By raising the temperature
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By lowering the activation energy
Did you know? Catalysts open an easier pathway, cutting the activation hill.
6.Which laboratory technique measures an unknown acid with a base of known strength?
- A. Sublimation
- B. Filtration
- C. Titration
- D. Distillation
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Titration
Did you know? Titration drips base into acid until the indicator flips.
7.Which NASA program first flew fuel cells for spacecraft power in the 1960s?
- A. Gemini and Apollo
- B. Space Shuttle
- C. Skylab
- D. Mercury
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Gemini and Apollo
Did you know? Apollo's fuel cells made electricity and drinking water.
8.What is the approximate pH of soap solution?
- A. About 4
- B. Exactly 7
- C. About 2
- D. About 9 to 10
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About 9 to 10
Did you know? Soap solution runs mildly alkaline, pH 9 to 10.
9.Which term names the electron-accepting species in a redox reaction?
- A. Reducing agent
- B. Catalyst
- C. Oxidizing agent
- D. Solvent
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Oxidizing agent
Did you know? The oxidizing agent accepts electrons and is itself reduced.
10.Which gas pops with a squeaky flame when a burning splint tests it?
- A. Carbon dioxide
- B. Oxygen
- C. Nitrogen
- D. Hydrogen
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Hydrogen
Did you know? The classic squeaky-pop test confirms hydrogen gas.
11.Which acid is the sting in ant bites, named for ants?
- A. Formic acid
- B. Lactic acid
- C. Oxalic acid
- D. Citric acid
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Formic acid
Did you know? Formic acid comes from formica, the Latin word for ant.
12.Who invented the pH scale and pH meter concept in 1909?
- A. Fritz Haber
- B. Søren Sørensen
- C. Arnold Beckman
- D. Willem Einthoven
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Søren Sørensen
Did you know? Denmark's Sørensen defined pH at the Carlsberg Lab.
13.Why does tomato sauce taste tangy?
- A. Its organic acids, like citric
- B. Its sulfur compounds
- C. Its alkaline salts
- D. Its iron content
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Its organic acids, like citric
Did you know? Tomatoes pack citric and malic acids, pH near 4.
14.Which everyday process is electroplating an example of?
- A. Redox deposition
- B. Fermentation
- C. Neutralization
- D. Sublimation
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Redox deposition
Did you know? Electroplating reduces metal ions onto a surface as a thin coat.
15.In an oxidation reaction, does a species gain or lose electrons?
- A. It gains electrons
- B. It loses electrons
- C. It gains protons
- D. It loses neutrons
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It loses electrons
Did you know? Oxidation is loss of electrons, remembered by the mnemonic OIL RIG.
16.Which point in titration marks exactly equal acid and base?
- A. Equivalence point
- B. Melting point
- C. Boiling point
- D. Flash point
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Equivalence point
Did you know? The equivalence point is where moles of acid match moles of base.
17.Which acid-base concept explains why ocean acidity harms shells?
- A. Salt crystallization
- B. Carbonate dissolving
- C. Iron rusting
- D. Vitamin loss
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Carbonate dissolving
Did you know? Acidified water dissolves calcium carbonate shells.
18.What do we call oxidation caused only by air's oxygen over time, like tarnishing silver?
- A. Tarnishing
- B. Fermentation
- C. Hydrogenation
- D. Vulcanizing
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Tarnishing
Did you know? Tarnish is the slow air oxidation of silver into black sulfide and oxide films.
19.Which gas bubbles out at the cathode during water electrolysis?
- A. Nitrogen
- B. Oxygen
- C. Carbon dioxide
- D. Hydrogen
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Hydrogen
Did you know? Electrolysis gives hydrogen at the cathode and oxygen at the anode.
20.Which condition generally doubles many reaction rates when raised by 10 degrees C?
- A. Color
- B. Pressure
- C. Volume
- D. Temperature
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Temperature
Did you know? Warmth speeds molecular collisions; the rule of thumb near-doubles rates per 10 degrees.
21.Which principle predicts how equilibrium shifts when you stress it?
- A. Archimedes' principle
- B. Boyle's law
- C. Le Chatelier's principle
- D. Ohm's law
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Le Chatelier's principle
Did you know? Le Chatelier: stressed equilibrium shifts to relieve the stress.
22.What is the balanced state of a reversible reaction called?
- A. Saturation point
- B. Chemical equilibrium
- C. Freezing point
- D. Boiling point
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Chemical equilibrium
Did you know? At equilibrium, forward and backward rates match exactly.
23.Which reaction type swaps partners, like A-B plus C-D becoming A-D plus C-B?
- A. Decomposition
- B. Double displacement
- C. Radioactive decay
- D. Combination
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Double displacement
Did you know? Double displacement exchanges ions, as when silver nitrate meets salt water.
24.Which acid-base pair buffers blood near pH 7.4?
- A. Acetic acid and acetate
- B. Sulfuric acid and sulfate
- C. Carbonic acid and bicarbonate
- D. Citric acid and citrate
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Carbonic acid and bicarbonate
Did you know? The blood's bicarbonate buffer holds pH near 7.4.
25.Which companion process refines bauxite into alumina for smelting?
- A. The Solvay process
- B. The Bayer process
- C. The Ostwald process
- D. The Hall-Héroult process
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The Bayer process
Did you know? Bayer's 1888 alkaline leach readies alumina for the pots.
26.Which chain-reaction moderator in reactors slows neutrons, often as graphite or water?
- A. Catalyst
- B. Moderator
- C. Electrolyte
- D. Coolant only
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Moderator
Did you know? Moderators slow neutrons so uranium-235 catches them more easily.
27.In photosynthesis, is carbon dioxide reduced or oxidized into sugar?
- A. Reduced
- B. Unchanged
- C. Oxidized
- D. Dissolved
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Reduced
Did you know? CO2 is reduced into glucose while water is oxidized to oxygen.
28.Which 1839 inventor demonstrated the first fuel cell, hydrogen and oxygen to water?
- A. Christian Schönbein
- B. Humphry Davy
- C. Alessandro Volta
- D. William Grove
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William Grove
Did you know? Grove's 1839 gas battery ran on hydrogen.
29.Which cell arrangement of 1889 gave Walther Nernst his equation linking voltage to concentration?
- A. Solar cells
- B. Concentration cells
- C. Dry cells
- D. Fuel cells
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Concentration cells
Did you know? The Nernst equation predicts battery voltage by ion strength.

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