Class XII

Which is least soluble in water?
  1. AgCl
  2. Agl
  3. AgBr
  4. Ag2S
Ni2+ in traces can be tested using
  1. Dimethyl glyoxime
  2. Ammonium sulphocyanide
  3. Potassium ferrocyanide
  4. Sodium nitroprusside
Lucas reagent is
  1. H2SO4+HCL
  2. ZnCl2+HC
  3. MnO2+H2O
  4. NO+H2O
The inner transition metals of 5 f series is known as
  1. None of these
  2. Actinoids
  3. Lanthanoids
  4. Zirconium
Transition metals with highest melting point is
  1. W
  2. Hg
  3. Cr
  4. Sc
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