Q3.An ore has impurities which are lighter than the ore. The process used for the concentration of ore is
Answer : Option BExplaination / Solution:
This is hydraulic washing or gravity separation. Here when stream of water is passed it takes away all the impurity with it
Q8.Tetraaminecopper(II) ion is a square planar complex with one unpaired electron. According to valence bond theory the hybrid state of copper should be
Answer : Option CExplaination / Solution:
Tetraaminecopper(II) ion is square planar so hybridization is dsp2