Class XII

Which one of the following compound is deliquescent?
  1. HgCl2
  2. Hg2Cl2
  3. ZnCl2
  4. CdCl2
4d transition elements series are from
  1. Ce to Lu
  2. Sc to Zn
  3. Y to Cd
  4. La to Hg
Which among the following transition metal has lowest melting point?
  1. Cobalt
  2. Scandium
  3. Zinc
  4. Titanium
Which of the following sulphides is soluble in aqua regia?
  1. ZnS
  2. HgS , ZnS
  3. HgS
  4. CdS
The inner transition metals of 5 f series is known as
  1. None of these
  2. Actinoids
  3. Lanthanoids
  4. Zirconium
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LKG - 12th

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