A is a reddish brown metal, which combines with O_(2) at lt 1370 K gives B,a black coloured compound. At a temperature gt 1370 K A gives C which is red in colour. Find A,B and C with reaction.

A is a reddish brown metal, which combines with O_(2) at lt 1370 K giv

1.	A is a reddish brown metal, which combines with O_(2) at lt 1370 K gives B,a black coloured compound. At a temperature gt 1370 K A gives C which is red in colour. Find A,B and C with reaction.
Answer» SOLUTION :(i) Reddish brown metal (A) is copper. (ii) (A) reacts with `O_(2)` at below 1370 K gives copper (II) OXIDE (B), which is black in colour. `2CU + O_(2) underset("below")overset("1370 K")to 2CuO` (copper (II) oxide) (B) (iii) (A) reacts with `O_(2)` at above 1370 K gives copper (I) oxide(C ), which is ured in colour. `4Cu + O_(2) underset("above")overset("1370 K")to 2Cu_(2)O` (Copper (I) oxide) (C )