Question

Through which of the following does electric current not flow ?
(A) Solution of hydrochloric acid
(B) Copper wire
(C) Solid sodium chloride
(D) Molten sodium chloride​

Answer 1

Answer:

(C) Solid sodium chloride is your answer.

Explanation:

A substance can only conduct electricity if it contains charged particles (electrons or ions) that are free to move around. In solid sodium chloride, there are ions but these ions are locked into the ionic lattice and are unable to move.  NaCl (common salt) is solid in state and solid ions or compounds don't conduct electricity. It needs to be either melted, molten or dissolved in a solution (i.e. water) first. Only then will the electrons be free to move to either the Cathode (-ve) or to the Anode (+ve). In a liquid state the electrons are free enough to move.

Hope it helps you!(●ˇ∀ˇ●)

Answer 2

Electric current does not flow through solid sodium chloride.

• For the electric current to flow a solution is needed so that there is a formation of positively charge cations and negatively charged anions.

• A copper wire is a conductor of electricity because it is a metal and has free electrons in it, so electric current can flow through it.

• In solid sodium chloride, no formation of mobile ions take place due to which electric current may flow therefore electric current cannot travel through it.