Final answer:
No, acid flux is not the only flux that comes in paste form for solid-core soldering.
Step-by-step explanation:
No, this statement is false. Acid flux is a substance used to remove oxidation from metal surfaces, especially in soldering. It comes in different forms, including paste and liquid. When using solid-core solder, acid flux in paste form can be brushed onto the joint to enhance soldering.
However, there are also non-acid fluxes available that are suitable for soldering with solid-core solder. These non-acid fluxes are typically in liquid form and can be applied to the joint before soldering.
Therefore, acid flux is not the only type of flux that comes in paste form for use with solid-core solder.