Question

which of these shows a single displacement reaction?
ab + cd → ad + cb
a + b → ab
a + bc → ac + b
ab → a + b
the reaction a + b → ab is a general form for which type of chemical reaction?
combustion
decomposition
synthesis
single replacement

Explanation:

1. A single - displacement reaction has the general form where one element replaces another in a compound. In the reaction $A + BC

ightarrow AC + B$, element $A$ displaces element $B$ from the compound $BC$.

1. The reaction $A + B

ightarrow AB$ is a synthesis reaction where two or more substances combine to form a single compound.

Answer:

1. C. $A + BC

ightarrow AC + B$

1. C. Synthesis