Question

Identify(A) based on followihng facts :
a. `A` reduces `HgCl_(2)` solution to white ppt. charging to grey .
b. (A) turns ` FeCl_3` yellow colured solution to green .
c. (A) givewhite pot, with `NaOH` soluble ine xcess fo `NaOH` . ltrgt d. (A) gives yellow dirty ppt. on passing `H_2S` gs , soluble in yellow ammium sulpjde (YAS).
e. (A) gives chromyl chloride test .

Answer 1

(A) gives yellow dirty ppt . Soluble in `YAS`.
`rArr` (A) has `Sn^(2+)`
(A) gives chromyl chromyl chloride test `(of Cl^(Θ))`
`rArr` (A) has ` Cl^(Θ)`
` rarr` (A) is `SnCl_2`
Explanation :
a. `SnCl_2 + 2HgCl_2 rarr underset ("White ppt .") (Hg_2Cl_2 narrr) + Sncl_4`
`SnCl_2 + Hg_2Cl_2 rarr underset (Grey) + SnCl_4`
b. `underset ("Yellow") (2FeCl_3) + SnCl_2 rarr underset (Green) (2FeCl_2) + SnCl_4`
c.`SnCl_2 + 2NaOH rarrr underset ("White" ) (Sn (OH)_2) narr +2 NaCl`
` Sn(OH)_2 + 2NaOH rarr underset(("Soluble")) underset ("Sodium stannate ") (Na_2SnO_2 + 2H_2O)`
d. `SnCl_2 + H_2S rarr 2 HCl + underset ("Yellow") ("SnS narr")`
`SnS + (NH_4)_2 underset ((YAS)) (S_2) rarr (NH_4)_3 underset("Soluble") (SnS_3)`.