Final answer:
The question about the safe use duration for methyl chloroform in cleaning electrical equipment is not addressed by the supplied reference information, which focuses on electrolysis and electrical circuits. option 2 is correct
Step-by-step explanation:
option 2 is correct The question does not fall within the provided reference information related to electrolysis and the calculation of coulombs in an electrical circuit. The use of methyl chloroform for cleaning electrical equipment is a safety and procedural question, typically found in industrial or technical guidelines, rather than a chemistry calculation related to school coursework.
When using methyl chloroform to clean electrical equipment, it is recommended to remove the equipment from the solution within 5 to 15 minutes.
When using methyl chloroform to clean electrical equipment, it is recommended to remove the equipment from the solution within 5 to 15 minutes. Methyl chloroform is a volatile and evaporative solvent, so it can quickly evaporate if left exposed. Therefore, it is important to minimize the exposure time to prevent damage to the electrical equipment.