List - I Cations List - II Characteristics (P) Hg 2 + (1) Chloride gives positive chromyl chloride test (Q) Zn 2 + (2) Form coloured sulphide ppt. that dissolves in excess sulphide solution (R) Mg 2 +

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List - I Cations List - II Characteristics (P) Hg 2 + (1) Chloride gives positive chromyl chloride test (Q) Zn 2 + (2) Form coloured sulphide ppt. that dissolves in excess sulphide solution (R) Mg 2 + (3) Soluble salt forms ppt. with NH 4 ​ OH which dissolve in excess NH 4 ​ OH (S) Sn 2 + (4) Does not form precipitate with Na 2 ​ SO 4 ​ (5) Chloride can react with chloride of at-least one other cation of List-I

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HgCl 2 ​ does not give the chromyl chloride test. HgS S 2 − ​ e x cess ​ S o l u b l e [ HgS 2 ​ ] 2 − ​ black SnCl 2 ​ + HgCl 2 ​ → SnCl 4 ​ + Hg ↓ Zn ( OH ) 2 ​ e x ces s ​ NH 4 ​ OH ​ ​ [ Zn ( NH 3 ​ ) 4 ​ ] 2 +

List - I Cations	List - II Characteristics
(P) $Hg^{2 +}$	(1) Chloride gives positive chromyl chloride test
(Q) $Zn^{2 +}$	(2) Form coloured sulphide ppt. that dissolves in excess sulphide solution
(R) $Mg^{2 +}$	(3) Soluble salt forms ppt. with $NH_{4} OH$ which dissolve in excess $NH_{4} OH$
(S) $Sn^{2 +}$	(4) Does not form precipitate with $Na_{2} SO_{4}$
	(5) Chloride can react with chloride of at-least one other cation of List-I

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