Drag and drop each chemical equation into the correct box to match its word equation.

note: there is an extra chemical equation that does not match with any of the word equations.

The reaction corresponding to 1st option is Fe + S - > FeS

Reaction corresponding to 2nd option is 2Hg + O₂ - > 2HgO

Reaction corresponding to 3rd option is Ca + 2 H₂O - Ca(OH)₂ + H₂.

Reaction corresponding to 4th option is H₂ + Cl₂ - > 2 HCl.

The iron and sulphur undergoes a redox reaction where the iron gets oxidized to ferrous ion and Sulphur gets reduced to sulphide ion. Its an addition reaction as well.

The mercury and oxygen undergoes a redox reaction which makes the oxygen to oxide ion and mercury to mercuric ions. Its an addition reaction as well.

The calcium and water undergoes a displacement reaction where the calcium removes the hydrogen from water forming calcium hydroxide and hydrogen gas.

The hydrogen and chlorine undergoes an addition reaction forming hydrogen chloride. Its also a redox reaction as well.

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.