Which of the following is an organic compound?

Correct option is D

The correct answer is (D) C2H6

Explanation:
• Organic compounds are a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.
• C2H6 (Ethane) is a classic example of an organic hydrocarbon. It consists entirely of carbon and hydrogen atoms bonded together through covalent single bonds.
• Most organic compounds are derived from or produced by living organisms, though millions are now synthesized artificially.

Information Booster:
• Vital Force Theory: Historically, it was believed organic compounds could only be formed by living organisms. Friedrich Wöhler disproved this in 1828 by synthesizing urea (an organic compound) from ammonium cyanate (inorganic).
• Catenation: The primary reason for the vast number of organic compounds is carbon's ability to form stable, long chains and rings with itself, a property called catenation.

Additional Knowledge:
• NaCl (Option A): Sodium chloride is a simple inorganic ionic salt, completely lacking carbon.
• Na2CO3 (Option B): Sodium carbonate contains carbon, but carbonates, carbides, and simple oxides of carbon (like CO2) are conventionally classified as inorganic due to their lack of carbon-hydrogen bonds and mineral origins.
• CaCO3 (Option C): Calcium carbonate is an inorganic mineral compound, forming the bulk of limestone, chalk, and marble.