Question

In an electrolytic tank if solid MgO is taken as electrolyte, bulb does not glow because:

A) MgO is not constitued of ions

B) MgO dos not have free and mobile ion in its solid state

C) MgO is not soluble in water

D) MgO exists only in solid state

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Answer 1

option (b) is correct

mgo better known as magnesium oxide is made up of the ions:

$\tt mg^+2\: and\: O^-2$

for the conduction of electricity free and movable ions are required

MgO has ions but it doesn't conduct electricity

this is because MgO is a salt.

it is solid in state. in solid states there are no free electrons that can helps in the conduction of electricity

after looking at the theory we would evaluate the options.

option (A) ➡️ MgO is constituted of ions. ❎

option (B) ➡️ yes, this is the reason why conduction doesn't take place.✔️

option (C) ➡️ solubility has no role to play here ❎

option (D) ➡️ false ❎

hope this helps!!