Plz plz plz help my brain cells are dying

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?