Exploring the World of Metals

Which of the following is a common property of most metals?

• Poor electrical conductivity

• High melting point

• Brittle

• Transparent

What is the main component of the alloy brass?

• Iron

• Aluminium

• Copper

• Tin

Which metal is known for its resistance to corrosion?

• Iron

• Aluminium

• Gold

• Zinc

Which of the following is an example of a ferrous alloy?

• Bronze

• Brass

• Steel

• Pewter

What is the primary purpose of galvanising iron?

• To make it heavier

• To improve its appearance

• To prevent rusting

• To increase its electrical conductivity

Which metal is commonly used in electrical wiring due to its excellent conductivity?

• Lead

• Copper

• Silver

• Aluminium

What is the main disadvantage of using pure metals instead of alloys?

• Higher cost

• Lower strength

• More corrosion-resistant

• Better electrical conductivity

Which of the following metals is most likely to corrode in moist air?

• Gold

• Silver

• Iron

• Platinum

What is the main advantage of using stainless steel over regular steel?

• It is lighter

• It is cheaper

• It is more corrosion-resistant

• It is more flexible

Which of the following is a property of metals that allows them to be drawn into wires?

• Malleability

• Ductility

• Brittleness

• Hardness