Multiple choice The chief constituent of gobar gas is _____. methane ethane propane chlorine Reveal answer Fill a bubble to check yourself A Correct answer Explanation Gobar Gas contains: Methane (CH4) about 60% Carbon Dioxide (CO2) about 30% Hydrogen (H2) about 8% Nitrogen (N2) about 1% Water vapour (H2O) about 1% So, we see that methane is the main constituent of the Gobar gas.