Which of the following is an example of a biofertilizer? MCQ with Answer and Explanation

Explanation:
Methane (CH₄) is released from enteric fermentation in livestock (cattle) and from anaerobic decomposition in flooded rice paddies. It has a high global warming potential (25× CO₂ over 100 years). CO₂ mainly from fossil fuels. N₂O from fertilizers. CFCs from refrigerants. Agriculture contributes significantly to anthropogenic GHG emissions. Reducing methane can have rapid climate benefits.

Explanation:
Chromatography separates components of a mixture based on differential affinities between a stationary phase and a mobile phase. In paper chromatography, dyes separate due to different rates of movement. Distillation is for liquids, centrifugation for density-based separation, filtration for solids from liquids. Chromatography is used in forensics, drug testing, and food coloring analysis.

Explanation:
A homogeneous catalyst is in the same phase as the reactants. In the esterification of carboxylic acids with alcohols, liquid sulfuric acid (H2SO4) catalyzes the reaction between liquid reactants. Iron, platinum, and nickel are solid catalysts used for gaseous or liquid reactants, making them heterogeneous catalysts.