Multiple choice

Which of the following elements is common in petroleum, coal, fabrics and proteins?

  1. Carbon

  2. Sodium

  3. Calcium

  4. Chlorine
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A Correct answer
Explanation

Carbon is the common compound in petroleum, coal, fabrics and proteins. Coal and hydrocarbons are widely used as fuels. Carbon compounds are also used in formation of fabric. The essential ingredients of foods like proteins are composed of carbon.

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