EASY
JEE Advanced
IMPORTANT
Earn 100

When mercury is oxidized with a limited amount of oxidizing agent (i.e. an excess of Hg) then Hg+compounds are formed. If there is an excess of oxidizing agent then Hg2+compounds are formed. Explain this.

Important Questions on Group 12 - the Zinc Group

HARD
JEE Advanced
IMPORTANT
What are the electronic structures of Zn, Cd and Hg and their 2+ ions? Discuss their position in the periodic table. Would you expect them to behave as typical transition elements?
HARD
JEE Advanced
IMPORTANT
Draw the structure of zinc blende. What is the coordination number of the ions and what is the radius ratio?
MEDIUM
JEE Advanced
IMPORTANT
Explain how Zn is sacrificed in the extraction of Cd.
MEDIUM
JEE Advanced
IMPORTANT
Explain why a solution of zinc sulphate gives a white precipitate when added to an aqueous solution of ammonia, but not when added to an aqueous solution of ammonia containing ammonium chloride.
MEDIUM
JEE Advanced
IMPORTANT
What is cadmium used for, how is it produced, and why are there problems of cadmium poisoning in the vicinity of zinc smelters?
HARD
JEE Advanced
IMPORTANT
List the main ways in which mercury compounds are discharged into the environment. Comment on the toxicity of inorganic and organic mercury compounds.
HARD
JEE Advanced
IMPORTANT
Give an account of disproportionation. Why is the mercury (I) ion written Hg22+, whilst the copper (I) ion is written Cu+?
MEDIUM
JEE Advanced
IMPORTANT
What evidence is there that the mercury (I) ion is Hg22+ rather than Hg+?