NYGH - Metal Reactivity Series

Which of the following properties is always true for all metals?

• solid at r.t.p.

• high melting and boiling points

• good conductor of electricity

• higher density than water

Which of the following is not a reason why alloys are made?

• To improve appearance of the metal.

• To raise the melting point of the metal.

• To improve strength and hardness of metal.

• To improve resistance of the metal against corrosion.

Which of the following metals have the greatest tendency to lose electrons?

• calcium

• iron

• zinc

• magnesium

The following reaction takes place spontaneously.

A + water → B + hydrogen

Which of the following can be A and B?

• A = zinc ; B = zinc hydroxide

• A = calcium ; B = calcium oxide

• A = potassium ; B = potassium hydroxide

• A = iron ; iron oxide

Which of the following metals reacts readily with steam to form a product that is yellow when hot and white when cold?

• magnesium

• zinc

• iron

• lead

Arrange the metals W, X, Y and Z in increasing order of reactivity.

• X, W, Y, Z

• X, Y, W, Z

• Z, Y, W, X

• W, Z, Y, X

Between reacting with water, steam and acid, which of the following metals ONLY react with concentrated acid?

• sodium

• magnesium

• copper

• lead

Which of the following describes the thermite reaction?

2Al + Fe₂O₃ → Al₂O₃ + 2Fe

• It is a displacement reaction.

• Fe atoms are reduced to Fe³⁺ ions.

• It is highly endothermic.

• Iron is more reactive than aluminium.

What is one possible observation for the following reaction?

Zn (s) + Fe(NO₃)₂ (aq) → Zn(NO₃)₂ (aq) + Fe (s)

• Yellow solution turns colourless.

• Pale-green solution turns colourless.

• Solution remains colourless.

• Reddish-brown metal deposit seen.

Which of the following metals is the most reactive?

• Mg

• Ca

• Sr

• Ba