The anode of a dry cell is made up of
1). Iron
2). Cadmium
3). Zinc
4). Lead
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1. Which of the following is a natural dye ?
2. Which of the following elements has the lowest melting point?
4. Which one is a soluble salt in H2O?
5. Heavy metal pollution of water is caused by:
7. The graphite rods in the nuclear reactor
8. Bleaching action of moist sulphur dioxide is because of its