MCQ
The pair in which both species have iron is
- ANitrogenase, cytochromes
- BCarboxypeptidase, haemoglobin
- CHaemocyanin, nitrogenase
- ✓Haemoglobin, cytochromes
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$STATEMENT$-$2$: In water, orthoboric acid acts as a proton donor.
The reaction $X+Y^{2+} \rightarrow x^{2+} +Y$ will be spontaneous when :