Tests for gases and flame tests

The test for oxygen is that

• it relights a glowing splint

• it relights a burning splint

• it changes lime water to milky

• it makes a glowing splint go out

Carbon dioxide can be tested by using

• a glowing splint

• a burning splint

• damp red litmus

• lime water

What colour does litmus paper turn in the presence of chlorine?

• Red

• Blue

• Red then White

• Yellow

This test tube may contain Hydrogen. How could we test for this?

• Insert a glowing splint

• Insert a lit splint

• Insert a delivery tube

• Squeaky pop

5.Positive test/result for Carbon Dioxide gas?

• a) Lime water goes milky/cloudy

• b) Relights a glowing splint

• c) Lighted splint gives a squeaky pop.

• d) Bleaches damp indicator paper.

Flame colour for calcium ions

• Blue

• Orange Red

• Green

• Yellow

Flame colour for sodium ions

• Blue
• Red
• Green
• Yellow

Flame colour for lithium ions

• Blue

• Red

• Green

• Yellow

Metal ion with a lilac flame

• Na⁺
• K⁺
• Na²⁺
• K²⁺

When Copper sulfate is subjected to a flame test

• white flame with blue streaks

• Blue-green flame

• yellow flame with blue streaks

• no change