Question

(1)

chlorine
hydrochloric acid
***************
6V d.c.
supply
hydrogen
(i) Give the name of this process in which substances, such as hydrochloric acid, are decomposed by a
direct electric
current.
(1)
(ii) Describe what happens when a burning splint is applied to a mixture of hydrogen and air in a test
tube.
(2)

Answer 1

Electrolysis is the process of decomposing substances using a direct electric current. When a burning splint is applied to a mixture of hydrogen and air in a test tube, hydrogen gas ignites and produces a 'squeaky pop' sound.

Step-by-step explanation:

(i) The process in which substances such as hydrochloric acid are decomposed by a direct electric current is called electrolysis.

(ii) When a burning splint is applied to a mixture of hydrogen and air in a test tube, the hydrogen gas will ignite and produce a 'squeaky pop' sound. This is because hydrogen is highly flammable and reacts with oxygen in the air to form water vapor.

Learn more about Electrolysis, Combustion