Welcome to the Quiz!

This quiz contains 11 questions from a mix of 1 subtopics.

What percentage of the atmosphere is oxygen?

1 %

78 %

21 %

0.04 %

0

/

1

What is the name of the most abundant gas in the atmosphere?

Nitrogen

0

/

1

What is the percentage abundance of CO2 in the atmosphere?

0.04

%

%

0

/

1

What colour flame does magnesium give when burned in oxygen?

White

Orange/yellow

Purple

Pale blue

0

/

1

Illustration of a pale blue flame against a black background.

Which substance(s) burn with a pale blue flame?


(Select all that apply)

Sulfur

Magnesium

Hydrogen

0

/

2

What does magnesium form when burned in oxygen? 

(Give the name in words, not symbols)

Magnesium oxide

0

/

1

What does sulfur form when burned in oxygen? 

(Give the name in words, not symbols)

Sulfur dioxide

0

/

1

Two flasks showing magnesium oxide solution with pH indicators, one turning purple indicating alkaline and one turning red indicating acidic.

Is magnesium oxide acidic or alkaline when dissolved in water?

Acidic

Alkaline

0

/

1

Is sulfur dioxide acidic or alkaline when dissolved in water?

Acidic

Alkaline

0

/

1

If you heat a metal carbonate, it will produce a metal and dioxide.

oxide
carbon

0

/

2

What is the colour change when copper(II) carbonate decomposes to copper(II) oxide?

Black ➔ green

Green ➔ black

Green ➔ brown

Brown ➔ green

0

/

1