Question

Which one of the following is not a correct formation reaction? (products are correct)

A) H₂(g) + O(g) → H₂O(l)

B) H₂(g) + Cl₂(g) → HCl(g)

C) 6C(graphite) + 3H₂(g) → C₆H₆(l)

D) C(graphite) → C(diamond)

E) 6C(graphite) + 6H₂(g) + 3O₂(g) → C₆H₁₂O₆(s)

Answer 1

The incorrect formation reaction is A) H₂(g) + O(g) → H₂O(l) because oxygen should be diatomic, O₂, in its standard state.

Step-by-step explanation:

The question asks which of the listed reactions is not a correct formation reaction. A formation reaction is one in which one mole of a compound is formed from its elements in their standard states. By examining each reaction:

• H₂(g) + O(g) → H₂O(l): This is incorrect because oxygen should be in its diatomic form, O₂, as that is its standard state.
• H₂(g) + Cl₂(g) → HCl(g): This is a correct formation reaction, forming one mole of HCl from its elements.
• 6C(graphite) + 3H₂(g) → C₆H₆(l): This is a correct formation reaction for benzene.
• C(graphite) → C(diamond): This is a correct formation reaction, converting one form of elemental carbon to another.
• 6C(graphite) + 6H₂(g) + 3O₂(g) → C₆H₁₂O₆(s): This is a correct formation reaction for glucose.

The incorrect formation reaction is A) H₂(g) + O(g) → H₂O(l) because oxygen should be in its diatomic form O₂ in its standard state.