A magician was showing magic in a school. He took egg cell and fluoride solution over
result, effervescence seen. When he took a burning candle over it, it went off.
a) Identify the solution poured and the substance present in egg cell.
b) What is the reason behind effervescence?
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Answer-(i) (a) Solution is an acid. Substance in egg shell is calcium carbonate. (b) Effervescence is due to the evolution of CO2 gas.
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