From which compound do Red soil gets its color?

Answer 1

The way the question is worded makes me think that perhaps there's a misunderstanding of how color works in terms of chemistry. There are a wide variety of chemical compounds that are red; it would be impossible to list them all. Highly colored compounds tend to fall into one of two main categories: transition metal compounds, and conjugated organics. Different oxidation states of transition metal ions have characteristic colors. Those that sometimes have a red color include copper +, chromium 6+ and vanadium 5+. Various ligands in transition metal compounds can also affect the color. With conjugated organics it's a lot more difficult to figure out, because making a relatively small change in the molecule can result in a fairly significant change in the color. One good example is a compound called "methyl red" which is red in acidic solution but yellow in basic solution; the only difference in the compound itself is the presence or absence of a single hydrogen atom.

Answer 2

It Oxidation of iron in the dirt, basically rust.

Answer 3

iron.

Iron in the rocks combines with oxygen and forms iron oxide (iron + oxygen) which is red, and iron-rich soils will therefore have a red colour

Answer 4

Iron oxide.