Gas Tests

Question 1

When testing for hydrogen-What should you hold at the end of an open test tube?

Answer 1

A lit splint

Question 2

When testing for hydrogen-What sound is produced to indicate hydrogen is a present?

Answer 2

A squeaky pop sound

Question 3

When testing for hydrogen-Why is a squeaky pop sound produced?

Answer 3

This is because hydrogen burns rapidly in the presence of O2 to give H2O, therefore giving a squeaky pop sound

Question 4

When testing for Carbon Dioxide-What should you shake or bubble through CO2 with?

Answer 4

An aqueous solution of calcium hydroxide (lime water)

Question 5

When testing for Carbon Dioxide-What colour will it turn from and to if CO2 is present?

Answer 5

The colour will turn from colourless to cloudy if CO2 is present

Question 6

When testing for Chlorine-What should you insert into the test tube containing a gas?

Answer 6

Damp litmus paper

Question 7

When testing for Chlorine-If the gas is chlorine, what will happen to the litmus paper?

Answer 7

The litmus paper will bleach and change colour from red to white

Question 8

When testing for Oxygen-What should you place and hold inside the test tube?

Answer 8

You should place and hold a glowing splint inside of a test tube

Question 9

When testing for Oxygen-What will happen to the split if O2 is present?

Answer 9

The splint will relight