The answer is head-to-tail joining of monomers. Monomer used in condensation have two functional groups that combine to form amide and ester linkages. When this reaction occurs, water molecules is removed and that is why it is called a condensation reaction.
Answer:
the oxidation state od boron in sodium boron hydride is (+3).
2 H₂ + O₂ = 2 H₂O
Answer B only synthesis.
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