NCERT Question 17 - Chapter 1 Class 10 - Chemical Reactions and Equations

Last updated at April 16, 2024 by

A shiny brown coloured element ‘X’ on heating in air becomes black in colour.

Name the element ‘X’ and the black coloured compound formed.

 

Answer

Copper is a shiny brown coloured element.

It gets oxidised to CuO , which is a black coloured substance , on reaction with Oxygen present in air.

 

Hence, the substance ‘X’ is Copper (Cu).

The black coloured compound is CuO (Copper Oxide) formed by the following reaction;

2Cu + O 2     →  2CuO

        Heat

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