• By noor arora
• 11 Dec 2022

Q1. When Ag is exposed to air it gets a black coating of(a) AgNO3       (b) Ag2S          (c) Ag2O            (d) Ag2CO3 Answer: b Q2.What type of chemical reactions take place when electricity is passed through water?(a) Displacement       (b) Combination      (c) Decomposition