Question
WHICH OF THE FOLLOWING HAS LOWEST BOILING PT. (HARY. PMT 2003)
1) NaCl
2) CuCl
3) CuCI2
4) CsCl
SIR ANSWER GIVEN IS(3) . BUT AS THE NO. OF IONS IS MAX IN CuCl2 SO IT SHOULD HAVE MAX BP . THEN WHY ITS BP WILL BE MIN. ??
Solution by Joshi sir.
The only possibility is that the dissociation of the salt CuCl2 is low yet NaCl and CsCl are strongly dissociable salts. But CuCl should be less dissociable than CuCl2 . On this basis answer should be CuCl.
It is also probable that the question will be highest boiling point.