MCQ
Polyester is made up of the repeating units of a chemical called:
- ✓Ester
- BEther
- CCotton
- DEthene
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$(P)\, Fe(CO)_5\,\,\, (Q)\,CO\,\,\, (R)\, H_3B \leftarrow CO\,\,\,(S)\, [Mn(CO)_5]^-$
