Question

A burning charcoal on an iron plate was covered with a glass jar. What would you observe and why?​

Answer 1

Answer:

WHEN THE CHARCOAL IS COMPLETELY BURNT WE SEE THE BOTTOM OF THE GLASS JAR HAS TURNED BLACK

Explanation:

THIS HAPPENS DUE TO THE PRESENCE OF CARBON

Answer 2

Answer:

Burning of a candle needs continous supply of oxygen present in the air.

By covering the candle with a jar, the supply of oxygen gets cut and as there is only limited quantity

of oxygen left the candle burns for a moment then goes off completely.

Since there is no oxygen left in the jar.