Question

Q. A black coloured substance ' X ' is hard and porous. When it is burnt in the presence of air, it produces a gas ' Y ' which turns lime water milky . Name 'X' and 'Y' and write the equations involved.

Answer 1

Answer:

X is Carbon

Y is CO2.

C+O2--CO2

Ca(OH)2+ CO2--CaCO3+H2O