Which of the following are not single-displacement reactions?
o a. fe (s) + 2hcl (aq) → fecl2(aq) + h2 (9)
b. koh (aq) + hno3 (aq) – h20 () + kno3 (aq)
o c. na2s (aq) + 2hcl (aq) + 2nacl (aq) + h2s (g)
o d. ca (s) + 2h20 (1) ► ca(oh)2 (aq) + h2 (9)
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Explanation:

In a single-displacement reaction, one element exchanges partners with another element in a compound.

This is a single-displacement reaction, because the element Fe exchanges partners with H in HCl.

This is not a single-displacement reaction, because it is a reaction between two compounds.

This is a double displacement reaction in which the K⁺ and H⁺ cations change partners with the anions.

This is not a single-displacement reaction. It is another double displacement reaction, in which the Na⁺ and H⁺ cations change partners with the anions.

This is a single-displacement reaction, because the element Ca exchanges partners with H in H₂O.

are not single-displacement reactions.

b. th3 n4zc4 pl4t3 15 c0nv3rg1ng w1th the s0uth 4m3ric4n pl4t3.

i think its 100

i hope this !