Solid A overset("on")underset("heating")rarr anhydrous A A is:

1.	Solid A overset("on")underset("heating")rarr anhydrous A A is:
Answer» `K_(2)S_(2)O_(3)` `CaS_(2)O_(3)` `PbS_(2)O_(3)` `Na_(2)S_(2)O_(3)` Solution :`Na_(2)S_(2)O_(3)` is the only THIOSULPHATE which is hydrated. `{:(Na_(2)S_(2)O_(3).5H_(2)O overset(DELTA)rarr,Na_(2)S_(2)O_(3)+5H_(2)O),(,""darrDelta),(,Na_(2)SO_(4)+Na_(2)S_(5)):} ` `Na_(2)SO_(4): NA^(+) .^(-)O-overset(O)overset(\|\|)underset(O)underset(\|\|)(S)-O^(-)Na^(+)`, `S_(2)O_(3)^(2-) + CN^(-) rarr SCN^(-) +SO_(3)^(2-)` `Fe^(3+) +3SCN^(-) rarr Fe(SCN)_(3)`

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