Gases consist of particles that 

Fill in the blank with a suitable number

$(1000/100)$ _____ millilitres $\left(\mathrm{ml}\right) = 1$ litre‌ $\left(\mathrm{l}\right)$.

Give a reason for the following.
We cannot press a solid.

Write the properties of the following substances.

1. Salt

2. Flour

3. A chapati

Give a reason for the following.
We need a container to store a liquid.