science form 3 chapter 4

Reactivity of metal towards oxygen increases down the reactivity series of metal diagram

• True

• False

In a vigorous reaction between a more reactive metal such as magnesium and oxygen, a bright flame is observed

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a less vigorous reaction between a less reactive metal such as iron and oxygen, only a glow or slow change in colour is observed

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Magnesium is more reactive towards oxygen compared to

• Calcium

• Zinc

• Sodium

• Potassium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If carbon can remove oxygen from a metal oxide, it means carbon is ___________ reactive than the metal.

• more

• less

The most reactive metal in the reactivity series of metals is ______________.

• Calcium

• Potassium

• Magnesium

• Aluminium

What are the two non-metal elements that are included in the reactivity series of metals?

• Calcium

• Carbon

• Sodium

• Hydrogen

Choose the correct sequence.

.............. , ............ , .........

----------------------------------->

Reactivity towards oxygen increases

• Silver , Copper , Tin

• Iron , Lead , Mercury

• Magnesium , Aluminium , Calcium

• Iron , Carbon , Lead

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What will happened when lead oxide react with hydrogen?

• Lead oxide burns brightly

• Yellow powder turns shiny grey

• Lead is produced

• All of the above

Tags

NGSS.HS-PS1-2

Based on the diagram, what is the function of anhydrous calcium chloride in the experiment?

• To absorb water vapour so that dry hydrogen will be produced

• To supply hydrogen gas

• To separate the metals

• To release heat for combustion

Tags

NGSS.HS-PS1-2