JEE MAIN - Chemistry (2022 - 29th July Evening Shift - No. 7)
Which of the following $$3\mathrm{d}$$-metal ion will give the lowest enthalpy of hydration $$\left(\Delta_{\text {hyd }} \mathrm{H}\right)$$ when dissolved in water ?
$$\mathrm{Cr}^{2+}$$
$$\operatorname{Mn}^{2+}$$
$$\mathrm{Fe}^{2+}$$
$$\mathrm{Co}^{2+}$$
Explanation
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