MCQ
Hydroxide soluble in ammonia is
- A$Al{(OH)_3}$
- B$Fe{(OH)_3}$
- C$Cr{(OH)_3}$
- ✓$Cu{(OH)_2}$
$Cu{(OH)_2} + 4N{H_3}\, \to \,[Cu{(N{H_3})_4}]{(OH)_2}$
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$A.$ $\left[ Fe ( CN )_6\right]^{3-}$;$B.$ $\left[ FeF _6\right]^{3-}$; $C.$ $\left[ CoF _6\right]^{3-}$; $D.$ $\left[ Cr (\text { oxalate })_3\right]^{3-}$; $E.$ $\left[ Ni ( CO )_4\right]$
Choose the correct answer from the options given below:
(At. nos. $Cr = 24, Mn = 25, Fe = 26, Co = 27$)