Metals & Their Reactions

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| By CyBc

CyBc

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Quizzes Created: 1 | Total Attempts: 1,986

Questions: 8 | Attempts: 1,992 | Updated: Mar 21, 2023

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Questions and Answers

1.

Complete the word equation: Zinc + hydrochloric acid → ?
- A.
  
  Zinc hydrochloric + acid
- B.
  
  Zinc chloride + hydrogen
- C.
  
  Zinc chloric + hydrogen
- D.
  
  Zinc hydroacid + chloric
Correct Answer
B. Zinc chloride + hydrogen

Explanation
When zinc reacts with hydrochloric acid, it forms zinc chloride and hydrogen gas. This is a typical example of a single displacement reaction, where zinc replaces hydrogen in the hydrochloric acid to form zinc chloride.

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2.

Which of the following elements is a good conductor used in electrical wiring?
- A.
  
  Iron
- B.
  
  Sulfur
- C.
  
  Copper
- D.
  
  Carbon
Correct Answer
C. Copper

Explanation
Copper is a good conductor used in electrical wiring because it has a high electrical conductivity. This means that it allows electric current to flow through it easily. Copper is also ductile and malleable, making it easy to shape into wires. Additionally, copper has good thermal conductivity, which helps dissipate heat generated by the flow of electricity. These properties make copper an ideal choice for electrical wiring as it ensures efficient and safe transmission of electricity.

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3.

Which two chemicals can be used to make copper nitrate?
- A.
  
  Copper hydroxide and nitric acid
- B.
  
  Copper oxide and hydrochloric acid
- C.
  
  Copper and nitrogen dioxide
- D.
  
  Copper carbonate and sulfuric acid
Correct Answer
A. Copper hydroxide and nitric acid

Explanation
Copper hydroxide and nitric acid can be used to make copper nitrate. Copper hydroxide is a compound containing copper and hydroxide ions, while nitric acid is a strong acid containing nitrate ions. When these two chemicals react, the copper ions from copper hydroxide combine with the nitrate ions from nitric acid, forming copper nitrate. This reaction is a typical example of an acid-base reaction, where the hydroxide ions from copper hydroxide neutralize the hydrogen ions from nitric acid, resulting in the formation of water. The remaining copper and nitrate ions combine to form copper nitrate.

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4.

Complete the word equation: Magnesium + nitric acid → ?
- A.
  
  Magnesium nitric + acid
- B.
  
  Magnesium nitrate + oxygen
- C.
  
  Magnesium nitrate + carbon dioxide + water
- D.
  
  Magnesium nitrate + hydrogen
Correct Answer
D. Magnesium nitrate + hydrogen

Explanation
When magnesium reacts with nitric acid, it forms magnesium nitrate and hydrogen gas. This is because magnesium is a metal and nitric acid is an acid. The reaction between a metal and an acid typically produces a salt (in this case, magnesium nitrate) and hydrogen gas.

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5.

Which of the following metals reacts most vigorously with cold water?
- A.
  
  Sodium
- B.
  
  Iron
- C.
  
  Copper
- D.
  
  Gold
Correct Answer
A. Sodium

Explanation
Sodium reacts most vigorously with cold water because it is a highly reactive alkali metal. When sodium comes into contact with water, it undergoes a violent reaction, producing hydrogen gas and sodium hydroxide. This reaction is exothermic and releases a large amount of heat. In contrast, iron, copper, and gold are less reactive and do not react with cold water.

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6.

Which of the following metals could produce zinc metal, if heated with zinc oxide?
- A.
  
  Aluminium
- B.
  
  Magnesium
- C.
  
  Copper
- D.
  
  Silver
Correct Answer
A. Aluminium

Explanation
Aluminium is the correct answer because it is more reactive than zinc. When heated with zinc oxide, aluminium can displace zinc from its compound and form zinc metal. This is known as a displacement reaction, where a more reactive metal displaces a less reactive metal from its compound. Magnesium, copper, and silver are all less reactive than zinc, so they cannot displace zinc from its compound and produce zinc metal.

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7.

Which of the following metal mixtures could be separated from one another by adding dilute hydrochloric acid? Assume that the metals simply mixed, and have not formed an alloy.
- A.
  
  Sodium and potassium
- B.
  
  Magnesium and zinc
- C.
  
  Magnesium and copper
- D.
  
  Copper and silver
Correct Answer
C. Magnesium and copper

Explanation
Magnesium and copper can be separated from each other by adding dilute hydrochloric acid. This is because magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas, while copper does not react with hydrochloric acid. Therefore, when hydrochloric acid is added to the mixture of magnesium and copper, the magnesium will dissolve and separate from the copper.

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8.

Complete the word equation: Zinc carbonate + hydrochloric acid → ?
- A.
  
  Zinc chloride + carbon dioxide
- B.
  
  Zinc chloride + carbon dioxide + water
- C.
  
  Zinc chloride + water
- D.
  
  Zinc chloride + oxygen
Correct Answer
B. Zinc chloride + carbon dioxide + water

Explanation
When zinc carbonate reacts with hydrochloric acid, it forms zinc chloride, carbon dioxide, and water. This is a typical example of a double replacement reaction, where the cations of the reactants switch places to form new compounds. In this case, the zinc cation from zinc carbonate combines with the chloride anion from hydrochloric acid to form zinc chloride. Simultaneously, the carbonate anion from zinc carbonate combines with the hydrogen cation from hydrochloric acid to form carbon dioxide and water.

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Current Version
Mar 21, 2023

Quiz Edited by
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Jul 02, 2014

Quiz Created by
CyBc

Metals & Their Reactions

Complete the word equation: Zinc + hydrochloric acid → ?

Which of the following elements is a good conductor used in electrical wiring?

Which two chemicals can be used to make copper nitrate?

Complete the word equation: Magnesium + nitric acid → ?

Which of the following metals reacts most vigorously with cold water?

Which of the following metals could produce zinc metal, if heated with zinc oxide?

Which of the following metal mixtures could be separated from one another by adding dilute hydrochloric acid? Assume that the metals simply mixed, and have not formed an alloy.

Complete the word equation: Zinc carbonate + hydrochloric acid → ?