An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substances X and Y are
A. X = Fe, Y = Fe₂O₃
B. X = Ag, Y = Ag₂S
C. X = Cu, Y = CuO
D. X = Al, Y = Al₂O₃
Answer:A
An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substances X and Y are
A. X = Fe, Y = Fe₂O₃ B. X = Ag, Y = Ag₂S C. X = Cu, Y = CuO D. X = Al, Y = Al₂O₃