Question

I)the surface of some metals acquires a dull appearance when exposed to air for a long time. (ii) sodium is kept immersed in kerosene oil. (iii) a salt which does not conduct electricity in the solid state becomes a good conductor in molten state. (in) ionic compounds have generally high melting points. (v) the galvanized iron article is protected against rusting even if zinc layer is broken.

Answer 1

1.because some metal are highly reactive

2.because sodium is highly reactive metal.

Answer 2

Answer:

The above answer is right I read that answer