🔍 Key Concepts
• Difference between primary cells and secondary cells in batteries
• What it means chemically and practically to be rechargeable
• Role of electrolyte and solubility of reaction products in battery operation
💭 Think About
• Ask yourself: which type of cell is specifically designed so that the chemical reaction can be reversed by applying an external current?
• Consider whether the definition of a secondary cell is based mainly on rechargeability, on solubility of products, or on both together.
• Think about common rechargeable batteries you know (like lead-acid or lithium-ion): what key feature makes them different from everyday disposable batteries?
✅ Before You Answer
• Make sure you know that primary cells are generally considered non‑rechargeable and secondary cells are the other category.
• Check whether the phrase about products "not soluble in the electrolyte" is a universal characteristic of all secondary cells or more specific to certain types only.
• Confirm which single property is used as the basic textbook definition of a secondary cell before choosing among the options.