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Which of the following is not used as biomass?

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in Applied Chemistry by (101k points)
Which of the following is not used as biomass?

(a) Hybrid poplar

(b) Willow algae

(c) Iron nails

(d) Trap grease

This question was addressed to me in an online interview.

Asked question is from Biomass and Biofuel in chapter Non Conventional Energy Sources and Storage Devices of Applied Chemistry

1 Answer

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Best answer
Right answer is (c) Iron nails

Easiest explanation: The hybrid poplar and willow algae are the energy crops that can be used as the biomass. The trap greases comes under the urban wastes that can be used as biomass. Iron nails are not the biomass.

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