Gr 8 Gir FA Metals and Non metals Chapter 4

Which metal reacts with oxygen to form a dull black compound?

• Iron

• Copper

• Aluminium

• Magnesium

Reactivity is a ________property of Metal

• Chemical Property

• Physical Property

____________Reacts with metals to form hydrogen gas.

• Bases

• Salts

• Acids

• All

Complete the equation below.

Iron + Oxygen -->

• Iron oxide

• Ion Oxide

• Iron oxygen

• Iron sulphide

Which metal oxide is shown being formed here?

• Copper oxide

• Iron oxide

• Aluminium oxide

• Magnesium oxide

Which set of properties do metals show?

• hard , malleable , low melting point

• soft , malleable , high melting point

• hard , malleable , high melting point

• hard , brittle, ductile

Why does Aluminium does not not corrode as quickly as iron and steel?

• It is not reactive

• It is always painted

• It has a protective layer of aluminium oxide

• It always form aluminium hydroxide

Which of the following is arranged according increasing reactivity?

• Mg > Ca > Na > K

• K > Mg > Na > Ca

• Na > Ca > Mg > K

• Mg > Na > Ca > K

When a metal reacts with cold water the products are...

• Metal oxide and oxygen gas

• Metal hydroxide and oxygen gas

• Metal oxide and hydrogen gas

• Metal hydroxide and hydrogen gas

Which one of the following two metals reacts most vigorously with acids?

• Magnesium and Zinc

• Iron and Copper

• Silver and Gold

• Sulphur and Copper