Question

In hydrogen cycle _________ is a sink used.

(a) Ocean

(b) Fossil fuels

(c) Microbial soil uptake

(d) Nitrogen fixation

This question was posed to me in a national level competition.

The above asked question is from Various Cycles of Environment topic in section Other Major Topics in Civil Engineering of Basic Civil Engineering

Answer 1

The correct answer is (c) Microbial soil uptake

For explanation I would say: There are mainly 2 sinks used in hydrogen cycle – oxidation by hydroxyl radicals and microbial soil uptake. The rest of the options are sources.