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A continuous reactor at steady state contains 0.04 g.l-1 of biomass and 0.02 g.l-1 of phenol. The feed contained 0.1 g.l-1 of phenol. The biomass yield would be

0.4 g.g-1
0.5 g.g-1
1.0 g.g-1
5.0 g.g-1

Correct Answer: 0.5 g.g-1

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