Question

Match each chemical reaction with its type by writing the corresponding letters and numbers.

1) AgNO3+ NaCl → AgCl + NaNO3 a) Synthesis reaction

2) C2H6 + O2 → CO2 +H2O +energy b) Double displacement reaction

3) 2HgO → 2Hg + O2 c) Decomposition reaction

4) 3 H2(g) + N2(g) → 2 NH3(g) d) Combustion reaction

Answer 1

Methane is an odorless, colorless, flammable gas. It is used primarily as fuel to make heat and light. It is also used to manufacture organic chemicals. Methane can be formed by the decay of natural materials and is common in landfills, marshes, septic systems and sewers.