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Common Ion Effect

Which among t...

Question

Which among the following compound is a white coloured precipitate? ___
$P b C l_{2}, H g_{2} C l_{2}, A l (O H)_{3}, Z n S, H g S, S n S_{2}, C d S, S r C O_{3}, B a C O_{3}$

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Solution

$P b C l_{2}, H g 2 C l_{2}, A l (O H)_{3}, Z n S, S r C O_{3}$ and $B a C O_{3}$ are white in colour.

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Similar questions

Q. Which of the comparison regarding

Z n, C d, H g

is/are correct?

Z n {C l}_{2}

is ionic whereas

C d {C l}_{2}

H g {C l}_{2}

Z n

C d

dissolves in dilute acid

(H C l)

H_{2}

H g

Z n

C d

forms precipitate of

Z n (O H)_{2}

C d {(O H)}_{2}

H g

forms coloured precipitate of

H g (O H)_{2}

A_{2}^{2 +}

Q. The thermal stability of alkaline earth metal carbonates–

M g C O_{3}, C a C O_{3}, S r C O_{3}

B a C O_{3}

, follows the order:

Q. The thermal stability of

B a C O_{3}, C a C O_{3}, S r C O_{3}

M g C O_{3}

decreases in the order

Q. Consider the following reaction:

Barium adipate Dry distillation - -------- \to Δ, - B a C O_{3} (A) Z n - H g - --- \to a q . H C l (B)

Compound (B) is:

Q. Assertion :Increasing order of covalent character among given compounds is

H g {C l}_{2} < C d {C l}_{2} < Z n {C l}_{2}

. Reason: Order of size of cations is

{Z n}^{2 +} < {C d}^{2 +} < {H g}^{2 +}

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