Select all of the following choices that would be a nonconducting substance or
(all dissolved in water)
-sucrose c12h22o11
-cacl2
-bef2
-baf2
-distilled water
*pick more than one*

Options A and E

Explanation: since A is non electrolyte , doesn't form any ions in aqueous solution. Hence non conducting and distilled water is pure without any ions and has only neutral water molecules. Hence it is non conducting substance.

And remaining all are ionic compounds and gives ions in aqueous solution and conduct the electricity. Hence they all acts as conductors.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."