Burning Magnesium

When something burns, it reacts with the __________ in the air.

• Nitrogen

• Oxygen

• Carbon dioxide

• Neon

When magnesium is burnt, a white substance is formed. This substance is ____________________.

• Oxygen Magnetite

• Magnesium sulfide

• Magnesium oxide

• Magnesium chloride

Burning magnesium is an example of a __________ reaction.

• chemical

• physical

• biological

All the following are physical reactions, except ...

• boiling water in a kettle

• melting ice

• ironing a dress

• burning a match

It is advised not to look directly at the flame when magnesium is burning, which of the following is the reason?

• Magnesium can easily catch fire

• Watching the flame directly could harm your eyes

• Burning magnesium is a chemical reaction

Magnesium burns with a bright _________ flame.

• white

• red

• blue

• green

Magnesium is a/an __________________.

• compound

• ion

• element

• electron

In a chemical reaction,

• no new substance is formed

• a new substance is formed

• products and reactants have the same properties

• reactants are not needed

Melting candle wax is a ________________ reaction.

• chemical

• physical

• biological

Burning a candle is an example of a ___________ reaction.

• chemical

• physical

• biological