`Ni+H_(2)SO_(4)` (hot and concentrated) `to X(g)` The liberated gas (select the correct statement)A. develops blue colour spots on the filter paper moistened with potassium iodate and strach solutionB. turns acidified `K_(2)Cr_(2)O_(7)` solution greenC. produces black precipitate with lead acetate solutionD. reacts with `Cl_(2)` water to produce an acid which gives white fumes with ammonia.

`Ni+H_(2)SO_(4)` (hot and concentrated) `to X(g)` The liberated gas (s

1.	`Ni+H_(2)SO_(4)` (hot and concentrated) `to X(g)` The liberated gas (select the correct statement)A. develops blue colour spots on the filter paper moistened with potassium iodate and strach solutionB. turns acidified `K_(2)Cr_(2)O_(7)` solution greenC. produces black precipitate with lead acetate solutionD. reacts with `Cl_(2)` water to produce an acid which gives white fumes with ammonia.
Answer» Correct Answer - A,B,D (A)`5SO_(2)+2IO_(3)^(-)+4H_(2)O to I_(2)+5SO_(4)^(2-)+8H^(+) , I_(2)+` starch `to` blue colour. (B)`2H^(+)+3SO_(2)+Cr_(2)O_(7)^(2-) to 2Cr^(3+) ("green")+3SO_(4)^(2-) +H_(2)O` ( C)`Pb^(2+)+SO_(3)^(2-) to PbSO_(3) darr `(white) (D)`SO_(2)+2H_(2)O +CI_(2) to H_(2)SO_(4) + HCl` `HCl+NH_(3) to NH_(4)Cl` `NI+H_(2)SO_(4) +2H^(+) to Ni^(2+) +SO_(2) uarr [X] + 2H_(2)O` With dilute `H_(2)SO_(4)`, hydrogen gas is liberated.

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When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous `NaCl` to the blue solution gives a white precipitate O. Addition of aqueous `NH_(3)` dissolves O and gives an intense blue solution. The final solution containsA. `[Pb(NH_(3))_(4)]^(2+)` and `[CoCl_(4)]^(2-)`B. `[Al(NH_(3))_(4)]^(3+)]` and `[Cu(NH_(3))_(4)]^(2+)`C. `[Ag(NH_(3))_(2)]^(+)` and `[Cu(NH_(3))_(4)]^(2+)`D. `[Ag(NH_(3))_(2)]^(+)` and `[Ni(NH_(3))_(6)]^(2+)`
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