Aldehydes are organic compounds containing the formyl group, -CHO, where a carbon atom is double-bonded to an oxygen atom and single-bonded to a hydrogen atom. -OH is the hydroxyl group (alcohols), -COOH is the carboxyl group (carboxylic acids), and -CO- is the carbonyl group (ketones).
Explanation:
Natural gas is predominantly methane (CH₄), typically 70-95%. Ethane, propane, butane are minor components. CNG is compressed natural gas.
Explanation:
In electrolytic refining of copper, the electrolyte is acidified copper sulfate solution (CuSO₄ acidified with H₂SO₄). The anode is impure copper, cathode is pure copper. Cu²⁺ ions from the electrolyte are reduced and deposited on the cathode, while copper from anode oxidizes and enters solution. Impurities settle as anode mud (containing Ag, Au).
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