Which gas is the main constituent of biogas and natural gas?
A. Propane
B. Ethane
C. Methane
D. Butane
Answer: Option C
Solution (By JKExamLibrary)
Methane (CH₄) is the primary component of both natural gas (about 70-90%) and biogas (about 50-75%). It is the simplest alkane and a clean-burning fossil fuel. Ethane, propane, and butane are present in smaller amounts in natural gas but are not the main constituent.
Explanation:
Covalent compounds generally have low melting and boiling points because the intermolecular forces (van der Waals forces) holding the molecules together are relatively weak compared to the strong ionic bonds in ionic compounds. They are also generally poor conductors of electricity as they lack free ions.
Explanation:
Isoelectronic species have the same total number of electrons. Carbon monoxide (CO) has 6 (from C) + 8 (from O) = 14 electrons. Nitrogen molecule (N2) has 7 + 7 = 14 electrons. Therefore, N2 is isoelectronic with CO. O2 has 16, CO2 has 22, and NO has 15 electrons.
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