A piece of black electrode used in dry cell on strong heating in air gave a colorless gas which tuned lime eater milky. What was the material of the electrode?

Explanation

We know that graphite is used for making the electrodes . So the piece if black electrode used in the dry cell is made of graphite .(which is an allotrope of carbon element). This is confiremd by the fact that the piece of electrode on strong heating in iar gave a colouless gas carbon dioxide which turned lime water milky . Thus , the material of the electrode is graphite.