KCET 2023 | Coordination Compounds Question 1 | Chemistry

If a didentate ligand ethane-1, 2-diamine is progressively added in the molar ratio en : Ni :: 1: 1, 2 : 1, 3 : 1 to $$\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$$ aq solution, following co-ordination entities are formed.

I. $$\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_4 \mathrm{en}\right]^{2+}(a q)$$ - pale blue

II. $$\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_2(\mathrm{en})_2\right]^{2+}(\mathrm{aq})$$ - blue/purple

III. $$\left[\mathrm{Ni}(\mathrm{en})_3\right]^{2+}(\mathrm{aq})$$ - violet

The wavelength in $$\mathrm{nm}$$ of light absorbed in case of I and III are respectively

$$475 \mathrm{~nm}$$ and $$310 \mathrm{~nm}$$

$$300 \mathrm{~nm}$$ and $$475 \mathrm{~nm}$$

$$310 \mathrm{~nm}$$ and $$500 \mathrm{~nm}$$

$$600 \mathrm{~nm}$$ and $$535 \mathrm{~nm}$$

KCET 2023

MCQ (Single Correct Answer)

-0

Which of the following is an organometallic compound

$$\mathrm{CH}_3 \mathrm{COONa}$$

$$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{MgBr}$$

$$\left(\mathrm{CH}_3 \mathrm{COO}\right)_2 \mathrm{Ca}$$

$$\mathrm{CH}_3 \mathrm{ONa}$$

KCET 2023

MCQ (Single Correct Answer)

-0

When $$\mathrm{FeCl}_3$$ is added to excess of hot water gives a sol '$$X$$'. When $$\mathrm{FeCl}_3$$ is added to $$\mathrm{NaOH}(a q)$$ solution, gives sol '$$Y$$'

$$X$$ and $$Y$$ formed in the above processes respectively are

$$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{OH}^{-}$$ and $$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{Fe}^{3+}$$

$$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}$$ and $$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{Na}^{+}$$

$$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{Cl}^{-}$$ and $$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{OH}^{-}$$

$$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{Fe}^{3+}$$ and $$\mathrm{Fe}_2 \mathrm{O}_3 \cdot x \mathrm{H}_2 \mathrm{O} / \mathrm{OH}^{-}$$

KCET 2023

MCQ (Single Correct Answer)

-0

Which formula and name combination is incorrect?

$$\mathrm{K}_3\left[\mathrm{Al}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$$ - Potassium trioxalatoaluminate (III)

$$\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}\left(\mathrm{NO}_2\right)\right]$$ - Diamminechloridonitrito - N-platinum (II)

$$\left[\mathrm{CoCl}_2(\mathrm{en})_2\right] \mathrm{Cl}-$$ Dichloridodiethylenediammine cobalt (II) chloride

$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{Cl}\right] \mathrm{Cl}_2-$$ Tetraammineaquachloridocobalt (III) chloride

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