Question

Galvanized nails:

2. There is a flame test to confirm the gas bubbles produced in this reaction are hydrogen. What is the expectation if a flame is placed in the following gases?

a. An abundance of hydrogen:

b. In the presence of oxygen:

c. In the presence of carbon dioxide:

Answer 1

2.

a. When a burning splinter is introduced in a test tube filled with hydrogen, then the burning splinter burns with blue flame and later it extinguishes by making 'tup' or the 'pop' sound.

This is the confirmation test for hydrogen gas.

b. When a burning splinter is introduced in a test tube having oxygen, then it burns with more bright flame.

Since oxygen is the supporter of combustion .

c. When a burning splinter is introduced in carbon dioxide gas ,then immediately it stops burning .

Since carbon dioxide acts as a blanket around the fire place as it is heavier than oxygen so it pushes away oxygen from the fire place and extinguishes the fire.