Question

The ocean is estimated to supply $10-20$% of atmospheric _________, significant contributions coming from biomass burning, salt marshes and wood-rotting fungi.

• A. methyl chloride
• B. methyl bromide
• C. methyl iodide
• D. None of these

Answer 1

The correct option is A methyl chloride

The ocean is the largest known source for atmospheric methyl bromide and methyl iodide.

Furthermore, the ocean is also estimated to supply 10-20% of atmospheric methyl chloride, with other significant contributions coming from biomass burning, salt marshes and wood-rotting fungi.

Many subsequent chemical and biological processes produce poly-halogenated methanes.

Hence the correct option is A.