Gases of the Atmosphere

In the modern day atmosphere, what is the approximate percentage of nitrogen?

• 0.04%

• 21%

• 78%

• 1%

What is the laboratory test for Oxygen gas?

• Puts out a glowing splint

• Makes a squeaky pop sound with a burning splint

• Relights a glowing splint

• Burns with blue color

Which gas makes up about 1% of the air?

• oxygen

• carbon dioxide

• argon

• hydrogen

Which of the following is a greenhouse gas?

• Oxygen

• Nitrogen

• Argon

• Carbon Dioxide

When compound X is heated, it changes colour from green to black.

Compound Y is formed and a gas is given off which turns limewater milky.

X and Y are ......................................, respectively.

• calcium carbonate and calcium oxide

• copper carbonate and carbon

• copper carbonate and copper oxide

• copper sulfate and copper oxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How do we test for hydrogen?

• Lit splint goes out with a squeaky pop

• Hydrogen extinguishes a lit splint

• Bubbling through lime water

• Hydrogen makes a glowing splint relight

Magnesium burns in air to form magnesium oxide.

Magnesium oxide is...

• an acid

• an alkali

• a base

• a salt

Sulphur dioxide causes which environmental problem

• global warming

• acid rain

• eutrophication

• ozone layer depletion

Tags

NGSS.MS-LS2-4

What colour flame does sulphur burn with?

• White

• Blue

• Yellow

• Red

Which is NOT a method for determining the % of oxygen in air?

• Copper syringe experiment

• Phosphorus in a bell jar

• Rusting of iron

• Thermal decomposition of carbonates