Question: So I conducted a though experiment where I take a hollow spherical conductor and beef it up with a lot of electric charge. Here, I have ignored the ionization of air due to that huge amount of charge. Okay, coming to the point, is it possible that the hollow conductor, which is made of a certain metal and let's say if that piece of metal has low elastic limit, rupture due to the effect of its own electric pressure?
If we give it enough charge for a given radius then the charge density can be made substantially high (again assuming ionization of air to be absent and that the conductor can store that amount of charge).

Answer: 
No!

Uniform motion is motion in which velocity is constant and acceleration is 0.

Uniform acceleration : Motion in which acceleration is constant , therefore velocity is increasing or decreasing or even just the direction is changing for example a uniform circular motion

**Note:** Every uniform motion is having uniform acceleration but vice-versa does not always hold true
No, uniform motion implies constant speed, whereas uniform acceleration means constant acceleration.