Question

Of the species below, only is not an electrolyte.

1- KOH

2- NaNO3

3- HBr

4-LiCl

5-Ne

Answer 1

Electrolytes are those species which when dissolved in water (or other polar solvents) can carry electricity. They do so by dissociating into cations (+ve ions) and anions (-ve ions). In the above mentioned species, Neon (Ne) cannot carry electricity because it cannot dissociate into cation and anion. Neon is a noble gas which doesn't accept electrons or donates electron and hence cannot form ion and cannot carry electricity. Rest all compounds can dissociate into water according to following reactions-

$KOH\rightleftharpoons K^++OH^-$

$NaNO_3\rightleftharpoons Na^++NO_3^-$

$HBr\rightleftharpoons H^++Br^-$

$LiCl\rightleftharpoons Li^++Cl^-$

Thus, the answer will be (e) Ne

Thus