Is Matter Around Us Pure — Science STD 9 — Question

Write the full forms of the following:
LPG

What elements do the following compounds contain?
Sugar, Common salt

Find the ratio by mass of the combining elements in the following compounds.
NH₃

Name the term used for:

1. Solid directly formed from the gas.
2. Gas directly formed from the solid.

Name the technique to separate Camphor from salt.

The number of protons, neutrons and electrons in particles A to E are given below:

Particle	Protons	Neutrons	Electrons
A	17	18	17
B	3	4	2
C	18	22	18
D	17	20	17
E	9	10	10

Give reasons, find a pair of isotopes from the above particles.

Name the physical state of matter which can be easily compressed.

Define ‘formula mass’ of a compound.

What is the general name of:
Fluid forms of matter?

Write the full form of BEC.