Question

Identify elements from A,B,C and D and justify your answer.
A:On heating gives off gas and leaves some residue.
B:Burns in air to form carbon dioxide and water.
C:Burns in air to form carbon doixide gas only
D:Burns in air to form water only

Answer 1

Answer: A. Calcium Carbonate

              B. Methane

              C. Carbon

              D. Hydrogen

I hope u got ur answer...