Multiple choice

The soil is red because it contains

  1. potash

  2. iron

  3. nitrogen

  4. humus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Red soil gets its color from the presence of iron oxide compounds, particularly hematite and limonite. These iron compounds give the soil its characteristic reddish or reddish-brown appearance. The color indicates iron content, not potash, nitrogen, or humus.

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