The following reaction: H2 + I2 → 2HI, is an example of

a) synthesis.

b) decomposition.

c) single-displacement.

d) double-displacement.

The following reaction: H2 + I2 → 2HI, is an example of synthesis reaction

Explanation:

Synthesis reaction:

In simple words, synthesis reaction can be stated as two or more material merge to form a new material. A+X - ->AX A synthesis reaction is always exothermic since they deliver power in the form of heat and light. When the metal and nonmetals are combined they produce an ionic compound. A synthesis reaction is essentially the reversal of decomposition reaction. The example of Synthesis reaction would be 2 H2 (g) + O2 (g) - ->2 H2O (g) 3 H2 (g) + N2 (g) - -> 2 NH3 (g)