Metals and Alloys Quiz

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Questions and Answers

Which element is added to brass to cover iron in a thin layer to prevent it from rusting?

  • Aluminium
  • Lead (correct)
  • Manganese
  • Silicon

What is the appearance of brass?

  • Reddish brown
  • Golden yellow, reddish gold or silver (correct)
  • Bright red
  • Silvery grey

What is the melting point of zinc?

  • 1085°C
  • 160°C
  • 419.5°C (correct)
  • 900-1000°C

Which metal is resistant to corrosion among copper, zinc, and brass?

<p>Brass (D)</p> Signup and view all the answers

Which metal conducts heat and electricity less well than zinc?

<p>Brass (A)</p> Signup and view all the answers

Flashcards

What element is used to protect iron from rust?

Lead is an element used to coat iron with a thin layer, preventing rust.

What color is Brass?

Brass is a metal alloy that has a yellow-ish or gold-like color.

What is the melting point of zinc?

Zinc melts at 419.5 degrees Celsius, a relatively high melting point.

Which metal is more resistant to corrosion: copper, zinc, or brass?

Brass is more resistant to corrosion than copper or zinc.

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Which conducts heat and electricity less well: zinc or brass?

Brass is a less efficient conductor of heat and electricity than zinc.

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Study Notes

Brass and Its Properties

  • Zinc is added to brass as a protective coating for iron to prevent rusting.
  • Brass has a yellow-gold appearance, with a shiny and lustrous finish.

Properties of Zinc

  • The melting point of zinc is approximately 419.5°C (787.1°F).

Corrosion Resistance

  • Among copper, zinc, and brass, brass is known for its resistance to corrosion.

Conductivity Comparisons

  • Brass conducts heat and electricity less effectively than zinc does.

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