Which of the following is an acid-base reaction?
c(s) + o2(g) → co2(g)
none of them
2 hclo4(aq) + ca(oh)2(aq) → 2 h2o(l) + ca(clo4)2(aq)
fe(s) + 2 agno3(aq) → 2 ag(s) + fe(no3)2(aq)
mgso4(aq) + ba(no3)2(aq) → mg(no3)2(aq) + baso4(s)
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Explanation:

Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.

Neutralization reaction  is defined as the chemical reaction in which an acid reacts with a base to produce a salt and water molecule.

Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.

Example:

Double displacement reaction is one in which exchange of ions take place.  Example:

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