MCQ
Which is not easily soluble in water
- A${H_2}$
- B${O_2}$
- ✓$S{O_2}$
- D$C{O_2}$
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Identify $A$
$(A)$ $\left[ Ni \left( H _{2} O \right)_{2}( en )_{2}\right]^{2+}$
$(B)$ $\left[ Ni \left( H _{2} O \right)_{4}(\text { en })\right]^{2+}$ and
$(C)$ $\left[ Ni ( en )_{3}\right]^{2+}$ is ...... .
