A shiny brown colour element 'X' on heating in air becomes black in colour. What is the name of the element 'X' and the black colour compound formed?
 

Asked by arup_chakraborty2007 | 20th May, 2017, 08:58: PM

Expert Answer:

Copper is the brown coloured element X which on heating in air becomes black coloured compound copper oxide.

Answered by Vaibhav Chavan | 22nd May, 2017, 11:22: AM