A Shiny Brown Coloured Element ‘X’ on Heating in the Air Becomes Black in Colour. Name the Element ‘X’ and the Black Coloured Compound Formed

Answer: Copper is the metal that has a gleaming brown colour. When copper is heated in the air, it combines with oxygen in the air to generate copper oxide, which is black in colour

2CuO → 2Cus + O₂g 

Copper (Cu) is an atomic number 29 chemical element. It’s a native metal, meaning it can be found in its purest form in nature. Below is a list of copper’s qualities.