Question

identify the type of reaction for the chemical equation: $2h_2 + o_2 \
ightarrow 2h_2o$
double replacement
single replacement
decomposition
synthesis

Explanation:

A synthesis reaction combines simpler substances into a more complex one. The equation \(2H_2 + O_2
ightarrow 2H_2O\) shows hydrogen and oxygen (two simple molecules) combining to form water (a more complex molecule), fitting the synthesis reaction definition. Double replacement involves ion swapping, single replacement has one element replacing another, and decomposition breaks a compound into simpler parts—none match here.

Answer:

D. Synthesis (assuming the options are labeled A - D with D as Synthesis; if the rightmost option is the fourth, then "The Rightmost Option (Synthesis)")