Form 3 Science

Mineral are solid _____________ or _________________ that are naturally found with certain crystalline structures and chemical composition on the Earth's crust.

(a)  

Calcium carbonate is a combination of:

• Calcium, carbon and nitrogen

• Calcium, hydrogen and nitrogen

• Calcium, oxygen and carbon

• Calcium, carbon and hydrogen

Tags

NGSS.MS-PS1-1

Reactivity of metal towards oxygen increases when going down the reactivity series of metal diagram.

• True

• False

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

• Calcium

• Potassium

• Magnesium

• Aluminium

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

Choose the correct sequence.

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

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

Reactivity towards oxygen increases

• Silver , Copper , Magnesium

• Iron , Lead , Mercury

• Magnesium , Aluminium , Calcium

• Iron , Carbon , Lead

Magnesium + oxygen ----------> X

What is X ?

• Magnesium oxide

• Magnesium dioxide

• Magnesium trioxide

• Magnesium(IV) oxide

Based on the following diagram, what is the function of potassium manganate (VII) crystals in this experiment?

• To supply oxygen

• To avoid the metals to mix with each other

• To release heat

• To give out water vapour

Tags

NGSS.MS-PS1-2

What are the two non-metal elements that are included in the reactivity series of metals? (Hint: Choose more than one answer).

• Calcium

• Carbon

• Sodium

• Hydrogen