The nature of binding for a crystal with $I$ (alternating) and evenly spaced positive and negative ions is:

Write the law of conservation of charge. Give one example.

How much positive and negative charge is there in a cup of water $(250 \; g)$?

From the following,what charges can be present on oil drops in Millikan's experiment? (Here $e$ is the electronic charge)

If a body is charged by rubbing it,its weight:

We have three identical metallic spheres $A, B$ and $C$. $A$ is given a charge $Q$,and $B$ and $C$ are uncharged. The following processes of touching of two spheres are carried out in succession. Each process is carried out with sufficient time.
$(i)$ $A$ and $B$
$(ii)$ $B$ and $C$
$(iii)$ $C$ and $A$
$(iv)$ $A$ and $B$
$(v)$ $B$ and $C$
The final charges on the spheres are