Tag: process of decantation

Q NO. 1: Choose the right answer.1) The symbol of gold is:a) G b) Au c) Ag d) Go2) Atmosphere has __ type of layers:a) 3 b) 4 c) 5 d) 63) How many elements are discovered so far:a) 118 b) 120 c) 122 d) 1254) The density of metals is:a) Low b) High c)…