question_answer

Which among the following chemical reaction represent a combination reaction?

A)  \[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\]                                                              

B)  \[2{{H}_{2}}+3{{O}_{2}}\to 2{{N}_{2}}O+2S{{O}_{2}}\]

C)  \[BaC{{l}_{2}}+{{H}_{2}}S{{O}_{4}}\to BaS{{O}_{4}}+2HCl\]         

D)  \[NaCl+AgN{{O}_{3}}\to AgCl+NaN{{O}_{3}}\]

E)  None of these