Chemical Properties MCQ Quiz - Objective Question with Answer for Chemical Properties - Download Free PDF

The correct answer is Copper.

Key Points

• Copper is known for its excellent resistance to corrosion in moist air, primarily due to the formation of a protective layer of copper oxide on its surface.
• Copper's corrosion resistance is superior to that of many other metals such as iron, magnesium, and zinc.
• This protective layer of copper oxide acts as a barrier, preventing further oxidation and corrosion.
• Copper's durability in various environmental conditions, including moist air, makes it a preferred material for plumbing, roofing, and electrical applications.

Additional Information

• Corrosion
  • Corrosion is the gradual destruction of materials, usually metals, by chemical and/or electrochemical reaction with their environment.
  • Common types of corrosion include rusting of iron, tarnishing of silver, and oxidation of copper.
• Protective Oxide Layer
  • Some metals, like aluminum and copper, form a protective oxide layer when exposed to air, which prevents further corrosion.
  • This phenomenon is known as passivation.
• Galvanic Corrosion
  • Occurs when two different metals are in electrical contact in a corrosive environment, leading to accelerated corrosion of the more anodic metal.
  • Using metals with similar electrochemical properties can help prevent galvanic corrosion.
• Copper Applications
  • Due to its corrosion resistance, copper is widely used in electrical wiring, plumbing, and roofing materials.
  • It is also used in marine environments and in the production of coins and decorative items.

The correct answer is U.

Key Points

• Uranium is a chemical element with the symbol U and atomic number 92.
• It is a silvery-grey metal in the actinide series of the periodic table.
• Uranium is weakly radioactive because all its isotopes are unstable.
• It is used as a fuel in nuclear power plants and in the manufacture of nuclear weapons.

Important Points

• Uranium was discovered in 1789 by the German chemist Martin Heinrich Klaproth.
• The element was named after the planet Uranus, which had been discovered eight years earlier.
• Uranium has the highest atomic weight of the naturally occurring elements.
• It is found in small amounts in most rocks and in the Earth's crust.

The correct answer is Copper.

Key Points

• Copper is known for its excellent resistance to corrosion in moist air, primarily due to the formation of a protective layer of copper oxide on its surface.
• Copper's corrosion resistance is superior to that of many other metals such as iron, magnesium, and zinc.
• This protective layer of copper oxide acts as a barrier, preventing further oxidation and corrosion.
• Copper's durability in various environmental conditions, including moist air, makes it a preferred material for plumbing, roofing, and electrical applications.

Additional Information

• Corrosion
  • Corrosion is the gradual destruction of materials, usually metals, by chemical and/or electrochemical reaction with their environment.
  • Common types of corrosion include rusting of iron, tarnishing of silver, and oxidation of copper.
• Protective Oxide Layer
  • Some metals, like aluminum and copper, form a protective oxide layer when exposed to air, which prevents further corrosion.
  • This phenomenon is known as passivation.
• Galvanic Corrosion
  • Occurs when two different metals are in electrical contact in a corrosive environment, leading to accelerated corrosion of the more anodic metal.
  • Using metals with similar electrochemical properties can help prevent galvanic corrosion.
• Copper Applications
  • Due to its corrosion resistance, copper is widely used in electrical wiring, plumbing, and roofing materials.
  • It is also used in marine environments and in the production of coins and decorative items.

The correct answer is U.

Key Points

• Uranium is a chemical element with the symbol U and atomic number 92.
• It is a silvery-grey metal in the actinide series of the periodic table.
• Uranium is weakly radioactive because all its isotopes are unstable.
• It is used as a fuel in nuclear power plants and in the manufacture of nuclear weapons.

Important Points

• Uranium was discovered in 1789 by the German chemist Martin Heinrich Klaproth.
• The element was named after the planet Uranus, which had been discovered eight years earlier.
• Uranium has the highest atomic weight of the naturally occurring elements.
• It is found in small amounts in most rocks and in the Earth's crust.