1 Aadarsh kumar Asked: October 18, 20202020-10-18T09:00:17+00:00 2020-10-18T09:00:17+00:00In: Class 10 A shiny brown coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed. 1 NCERT Solution for Class 10 Science Chapter 1 Chemical Reactions and Equations Exercises Questions Page No-16 Questions No-17 cbseclass10ncertscience Share Facebook 2 Answers Voted Oldest Recent Baldev 2021-02-01T15:25:32+00:00Added an answer on February 1, 2021 at 3:25 pm The brown coloured element ‘X’ is copper. On heating in air it forms copper oxide which is black in colour. 2Cu(s) + O2(g) → 2CuO(s) Copper Oxygen Copper oxide (Brown (Black) color) 0 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Anshita 2021-02-04T08:39:30+00:00Added an answer on February 4, 2021 at 8:39 am Copper is a brown coloured shiny element, when heated in air, it becomes black in colour. 2Cu+O2→2CuO Hence, the element ‘X’ is copper and black coloured compound formed is copper oxide. 0 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Leave an answerLeave an answerCancel reply Featured image Select file Browse Click on image to update the captcha. Save my name, email, and website in this browser for the next time I comment.