The cathode of a lead storage battery is made up of
1). Zinc
2). Lead
3). Lead oxide
4). Manganese dioxide
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1. Which of the following elements has the lowest melting point?
2. Natural rubber is the polymer of:
3. Earth's crust mainly contains ______.
4. Which of the following is an iron ore ?
5. The chemical bahaviour of an atom depends upon
6. Refrigerators keep food unspoiled because
7. Beryllium Sulphate is less soluble in water due to ?
8. Which one of the following pairs is NOT correctly matched?