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JEE Main levelOne or more correct optionsDifficulty 2 of 3cc127

Which of the following give a precipitate of $AgCl$ immediately on adding excess aqueous $AgNO X_{3}$ ? One or more options may be correct.

A $[Co (NH X_{3}) X_{5} Cl] Cl X_{2}$
B $[Co (NH X_{3}) X_{5} Cl] SO X_{4}$
C $[Cr (H X_{2} O) X_{6}] Cl X_{3}$
D $K X_{2} [PtCl X_{6}]$

Answer: A, C

A precipitate needs free (ionic)

Cl X^{-}

.

[Co (NH X_{3}) X_{5} Cl] Cl X_{2}

has two and

[Cr (H X_{2} O) X_{6}] Cl X_{3}

has three. In

[Co (NH X_{3}) X_{5} Cl] SO X_{4}

and

K X_{2} [PtCl X_{6}]

all chloride is inside the coordination sphere.

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