Metals and non metals

Which of these is a property of metals?

• It's malleable

• It's an insulator

• It's very brittle

Which element category could have the characteristic of brittle? Choose the best answer.

• Metal

• Nonmetal

• Metalloid

• Metalloid and Nonmetal

All of these properties describe metals except...

• malleable

• conductors

• brittle

• shiny

What is the main ore of aluminum?

• Al₂O₃.n H₂O

• Al₂SO₄.n H₂O

• Al(OH)₃.n H₂O

• Al₃O₄.n H₂O

Carbonate ores are first ____________ and converted into oxide ores.

• Roasted

• Calcinated

• Combusted

• Neutralized

Select all that apply:

Impurities present in bauxite are:

• Copper pyrite

• Ferrous tungstate

• Silica

• Ferric oxide

Identify the diagram:

• Separation based on gravity

• Magnetic separation

• Forth floatation

• Leaching

Kalhaee is coating a layer of _____________ over copper or brass.

• zinc

• aluminium oxide

• tin

• silver

Bronze is made up of:

• 60% copper and 40% zinc

• 60% copper and 40% tin

• 90% copper and 10% tin

• 90% copper and 10% zinc

Select the correct order of metals as per their reactivity:

• Mg > Al > Zn > Fe

• Al > Zn > Mg > Fe

• Mg > Zn > Fe > Al

• Al > Fe > Zn > Mg