Coordination Compounds

During the rainy season, electric wires—especially those made of metals like copper or aluminum—can react with moisture, carbon dioxide from the air, and environmental pollutants.

These reactions can lead to the formation of a greenish or whitish insulating layer of Metal oxide (e.g., copper carbonate on copper wires), which are poor conductors of electricity.

This insulating layer can interfere with proper current flow and cause power supply interruptions from electric poles to homes.

Correct answer: Metal oxide

Isomerism occurs when compounds have the same molecular formula but different structural arrangements. Among the given options:

• : Ethene, a simple alkene with no possibility of isomerism.
• : Ethane, a simple alkane with no possibility of isomerism.
• : Not a valid hydrocarbon formula (violates the general formula ).
• : Butane, which can exhibit structural isomerism (e.g., n-butane and isobutane).

Final Answer: The compound that can show isomerism is , which corresponds to option .

Step-by-step oxidation process:

• Ethanol ( ) is first oxidized to ethanal ( ), which is compound .
• Ethanal is further oxidized to ethanoic acid ( ), which is compound .

Final Answer: The names of compounds and are , which corresponds to option .

The given compound contains two double bonds ( ) and five carbon atoms in the longest chain. The numbering starts from the end closest to the first double bond to give the lowest possible numbers to the double bonds. The double bonds are located at positions 1 and 3:

However, since the options provided do not include "Buta-1,3-diene," we focus on the position of the first double bond (position 1). The compound is named as .

Final Answer: The IUPAC name of the compound is , which corresponds to option .

The atomic number of is 12, which corresponds to magnesium ( ) in the periodic table. Magnesium belongs to Group IIA (alkaline earth metals), and elements in this group typically lose 2 electrons to achieve a stable noble gas configuration.

Magnesium ( ) loses 2 electrons to form a ion. Therefore, the charge on the ion formed by is .

Final Answer: The charge on the ion formed by is , which corresponds to option .