MCQ
The transition metals have a less tendency to form ions due to
- AHigh ionisation energy
- BLow heat of hydration of ion
- CHigh heat of sublimation
- ✓All of these
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$(1)$ $Fe^{3+}$ gives brown colour with potassium ferricyanide
$(2)$ $Fe^{2+}$ gives blue colour with potassium ferricyanide
$(3)$ $Fe^{3+}$ gives red colour with potassium thiocyanate
$(4)$ $Fe^{2+}$ gives brown colour with ammonium thiocyanate

