Which of the alkali metal is having least melting point?

Which one of the following alkali metals give hydrated salts?

Which one of the following alkaline earth metal carbonates is thermally most stable

State as to why a solution of Na₂CO₃ is alkaline?

The second ionisation enthalpy of calcium is more that of first and yet calcium forms MgCI₂ not MgCL. why?

A white solid X is a compound of alkali metal. A piece of red litmus paper turns white when it is dipped into a freshly made aqueous solution of the white solid. Identify the white solid X.

Give one important one of sodium and potassium element.

Identify A, B, C, and  D and give their chemical formulae.
B + NaCl\( \rightarrow\) C + NH₄Cl

When alkali metals dissolves in liquid ammonia, the solution can acquire different colours.Explain the reason for. this type of colour change.

Present a comparative account of the alkali and akaline earth metals with respect to the following characteristics.
formation of oxosalts

Explain the Aluminium utensils should not be kept in water overnight.

Differentiate between slaked lime

Discuss the general characteristics and gradation in properties of alkaline earth metals.

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. Nitrates

Explain why?
A piece of burning magnesium continues to burn in SO₂

Give reson for the following CuCl is more covalent than NaCl

Reema takes milk every day . She also take curd and other milk products.She takes green leafy vegitables and fruits also. An adult body contains about 25g of magnesium and 1200 g of calcium and 5 g of iron .these elements must be a part of our diet. All enzymes that utilize ATP in phosphate transfer required magnesium as co-factor. the main pigment for the absorption of light in plants is chlorophyll, which contains magnesium. were as Anita does not like milk and takes lot of junk food.
Which vitamin is essential for absorption of calcium ?

Starting with sodium chloride how would you proceed to prepare? Sodium carbonate.

Explain the significance of sodium, potassium, magnesium and calcium in biological fluids.