HARD
JEE Advanced
IMPORTANT
Earn 100

Outline the preparation, properties, structure and use of basic beryllium acetate.

Important Questions on Group 2 - the Alkaline Earth Elements

MEDIUM
JEE Advanced
IMPORTANT
What is the reason why compounds of Be are much more covalent than other Group II compounds?
MEDIUM
JEE Advanced
IMPORTANT
Describe the difference in structure between BeH2 and CaH2.
EASY
JEE Advanced
IMPORTANT
Why do the halides and hydrides of Be polymerize?
EASY
JEE Advanced
IMPORTANT
What precautions are necessary when handling beryllium compounds?
MEDIUM
JEE Advanced
IMPORTANT
Under what conditions do the Group 2 metal ions form stable complexes with EDTA? How are the amounts of Ca2+ and Mg2+ present in water estimated by titration with EDTA? Why is the titration performed at a high pH? What indicator is used?
HARD
JEE Advanced
IMPORTANT
Describe how you would prepare a Grignard reagent from Mg and list five different uses of the reagent in preparative reactions.
HARD
JEE Advanced
IMPORTANT
The four general methods of extracting metals are thermal decomposition, displacement of one element by another, chemical reduction and electrolytic reduction. How are group 2 metals obtained and why are the other methods unsuitable?
HARD
JEE Advanced
IMPORTANT
On treatment with cold water, an element (A) reacted quietly liberating a colourless, odourless gas (B), and a solution (C). Lithium reacted with (B) yielding a solid product (D) which, effervesced with water to give a strongly basic solution (F). When carbon dioxide was bubbled through solution (C) an initial white precipitate (G) was formed, but this re-dissolved, forming solution (H) when more carbon dioxide was added. Precipitate (G) effervesced when moistened with concentrated hydrochloric acid, and gave a deep red colouration to a Bunsen burner flame. When (G) was heated with carbon at 1000°C a caustic white compound (I) was formed, which when heated with carbon at 1000° C gave a solid (J) of some commercial importance. Name the substances (A) to (J) and give balanced chemical equations for each of the reactions.