Study of Gas laws — CHEMISTRY STD 9 — Question

Intermixing of gases to form a homogeneous mixture.

Define the following terms
Precipitate

What do you observe when hydrogen gas is passed through a soap solution?

The following table shows electronic configuration of elements P, O, R and S. From the list, choose inert gases and give a reason/reasons for your choice:

Element	Electronic configuration
	K L M N
P	2, 8, 2, _
Q	2, _ , _, _,
R	2, 8, 18, 8,
S	2, 8, 8, _

Explain why:
A solution is always clear and transparent.

Name the metal which reacts fastest with cold water

Identify the gases from the observations:
A greenish yellow gas having a pungent and suffocating smell. It turns moist blue litmus paper red and then bleaches it.