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Greatest Binomial Coefficients

Cu 2+ gives w...

Question

${C u}^{2 +}$ gives white ppt of ${C u}_{2} I_{2}$ with $K I$ and deep blue colour of $[{C u ({N H}_{3})}_{4}]^{2 +}$ with aq. ${N H}_{3}$ (excess).

If the given statement is true enter 1 else enter 0.

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Solution

${C u}^{2 +}$ gives white ppt of ${C u}_{2} I_{2}$ with $K I$ . and deep blue colour of $[{C u ({N H}_{3})}_{4}]^{2 +}$ with aq. ${N H}_{3}$ (excess)
$2 C u^{2 +} + 2 K I \to C u_{2} I_{2} ↓ (w h i t e p p t) + 2 K^{+}$
$C u^{2 +} + 4 N H_{3} \to [C u (N H_{3})_{4}]^{2 +}$

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{F e}^{2 +}

gives blue colour, called Turnbull's blue with

K_{3} [{F e (C N)}_{6}]

{F e}^{3 +}

gives blue colour, called Prussian blue with

K_{4} [{F e (C N)}_{6}]

If the given statement is true enter 1 else enter 0.

{H g C l}_{2}

gives orange ppt with

K I

, which dissolves in excess of it forming

K_{2} {H g I}_{4}

called Nessler's reagent.

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Q. Alkaline solution of

{N H}_{4} C l

gives brown ppt. with

K_{2} {H g I}_{4}

If the given statement is true enter 1 else enter 0.

N H_{3} (a q)

reacts very easily with

C u^{2 +}

; if acid is added into aqueous solution of

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, there is no reaction.
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{N H}_{4}^{+}

salt gives brown ppt. with

K_{2} {H g I}_{4}

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If the given statement is true enter 1 else enter 0.

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