When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified as:
Zn
Fe
Pb
Hg
84Rn219 is a member of actinium series. The other member of this series is-
89Ac225
90Th232
15P35
92U235
Which one is malachite from the following?
Cu(OH)2
Fe3O4
CuCO3.Cu(OH)2
CuFeS2
C.
CuCO3.Cu(OH)2
Malachite: CuCO3.Cu(OH)2 (Green Color).