yes
Yes.
Not in its solid state. It will conduct electricity if molten or dissolved in water.
Not in their standard solid states, but they can if molten or dissolved in water.
All do - some just have greater conductivity than others
Lemon juice can conduct electricity.
yes all materials conduct electicity , but some are good conductor , some poor and some very poor
if lemon juice is diluted with water i.e. by electrolysis
if lemon juice is diluted with water i.e. by electrolysis
the majoriy of metals are good conductors such as cooper and iron other metals such as gold are not
Iron fillings will be corroded.
because of the power in the acid