Question

Identify the synthesis reaction from the options below:

A. Mg+H​₂SO4​→MgSO₄​+H₂

B. C+O₂​→CO₂​

C. Zn+2HCl→ZnCl₂​+H₂​

D. 2NaCl→2Na+Cl₂​

Answer 1

Option B. C+O₂→CO₂ is the synthesis reaction among the choices provided, where carbon and oxygen combine to form carbon dioxide.

Step-by-step explanation:

The synthesis reaction option from the list provided is B. C+O₂→CO₂. In this reaction, carbon (C) combines with oxygen (O₂) to form a single product, carbon dioxide (CO₂), which is characteristic of a synthesis or combination reaction. To clarify with examples of balancing equations, here are two balanced synthesis reactions:

• Mg + O₂ → 2MgO (Balanced as 2Mg + O₂ → 2MgO)
• Ca + H₂O → Ca(OH)₂ + H₂ (Balanced as Ca + 2H₂O → Ca(OH)₂ + H₂)

These balanced reactions show the combination of elements to form compounds, embodying the concept of a synthesis reaction.