MCQ
An electronic transition from $1s$ orbital of an atom causes
- ✓Absorption of energy
- BRelease of energy
- CBoth release or absorption of energy
- DUnpredictable
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$(P)\, Fe(CO)_5\,\,\, (Q)\,CO\,\,\, (R)\, H_3B \leftarrow CO\,\,\,(S)\, [Mn(CO)_5]^-$

