When we boil something then it changes to gaseous form but why an egg yolk converts to solid form

When we boil something then it changes to gaseous form but why an egg

1.	When we boil something then it changes to gaseous form but why an egg yolk converts to solid form
Answer» When an egg is heated or boiled , the proteins in the yolk Nd albumen are denatured. The existing bonds in the protein break Nd new bonds r formed.