Advertisements
Advertisements
Question
Lithium resembles magnesium in some of its properties. Mention two such properties and give reasons for this resemblance.
Solution
(i) Both Li and Mg are harder and lighter than other elements in their groups.
(ii) Both form ionic nitrides Li3N and Mg3N2 by heating in an atmosphere of nitrogen. Li resembles Mg due to similar atomic radii and ionic radii.
APPEARS IN
RELATED QUESTIONS
Why is Li2CO3 decomposed at a lower temperature whereas Na2CO3 at a higher temperature?
What happens when quick lime is heated with silica?
What happens when chlorine reacts with slaked lime?
What happens when calcium nitrate is heated?
Why is LiF almost insoluble in water whereas LiCl soluble not only in water but also in acetone?
Comment on the following observation:
Lithium is the only alkali metal to form a nitride directly.
How do you account for the strong reducing power of lithium in aqueous solution?
All compounds of alkali metals are easily soluble in water but lithium compounds are more soluble in organic solvents. Explain.
Assertion (A): The carbonate of lithium decomposes easily on heating to form lithium oxide and CO2.
Reason (R): Lithium being very small in size polarises large carbonate ion leading to the formation of more stable Li2O and CO2.
Lithium hydride can be used to prepare other useful hydrides. Beryllium hydride is one of them. Suggest a route for the preparation of beryllium hydride starting from lithium hydride. Write chemical equations involved in the process.
