|A) 2H2 + O2 → 2H2O||B) Na + Cl → NaCl|
|C) HA + BOH → H2O + BA||D) NaCl + AgNO3 → NaNO3 + AgCl|
Answer: B) Na + Cl → NaCl
When two or more chemical species combine to form a single product, the reaction is said to be synthesis reaction. It is also called as Direct Combination reaction.
Here in the given options, Sodium (Na) combines with Chlorine (Cl) to form a more complex single product Sodium Chloride (NaCl).