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Molecular Speeds - Vrms, Vavg, Vmps

A black color...

Question

A black colored (insoluble in $H_{2} O$ ) solid A does not dissolve in $H N O_{3}$ . Aqua regia can dissolve A forming B. B gives yellow precipitate C with $N a O H$ . B also gives an orange ppt. D with $K I$ . D dissolves in excess of $K I$ forming E. E gives brown ppt. with $N H_{4}^{+}$ salt in presence of $N a O H$ . A is precipitated if $H_{2} S$ gas is passed into the solution of B in $d i l . H C l$ .

The compound C is :

A

H g C l_{2}

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B

P b C l_{2}

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C

H g O

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D

P b O

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Solution

The correct option is C $H g O$
Reaction:
$H g C l_{2} + 2 N a O H \to H g O + 2 N a C l + H_{2} O$
B C

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Similar questions

Q. (A) gives white ppt (B) with NaOH, but (B) dissolves in excess of NaOH forming (C). (C) gives white ppt (D) when

H_{2} S

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B a C l_{2}

. (E) is insoluble in conc.

H N O_{3}

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Q. Colourless salt (A) give white ppt (B) with NaOH; ppt (B) dissolves in excess of NaOH to form (C). On passing

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Q. Salt (A) makes part of electrode and is insoluble in water. (A) is blackened by

{N H}_{3}

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(A) :

{H g}_{2} {C l}_{2}

(calomel)
(B) :

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If true enter 1, else enter 0.

Q. (A) (colourless solution) gives white ppt (B) with NaOH solution but ppt dissolves in excess of NaOH forming (C). (C) does not give ppt with

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State True or False.

A l B r_{3}

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Compound B is not soluble in:

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