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Thermal stability  size of the cation in carbonates increasing order of cationic size in alkaline earth metal is   Therefore the most thermal stable carbonates are of Barium Ans. (d) 
Answer- The smaller the size of ion higher is the charge density and high polarising power. And among the alkali metals, lithium-ion is the smallest in size and has the power to attract the water molecules. Ans is (a) Li  
The strength of metallic bond decreases down the group in the periodic table because as the size of cation increases the binding energies of their atoms in the crystal lattice decreases.  order of melting point     So, ans is (a) Na  
(i)  is small in size so it has high polarising power and  is also small in size. Compatibility of both the cation and anion are very high. So their lattice energy is also very high. When BeO is dissolved in water it's hydration energy is not sufficient to overcome its lattice energy. So, therefore, it is insoluble in water. On the other hand,  ions are large in size. Hence  ion can easily...
(a)The balanced reaction between  and water-     (b) the reaction between water and - (c) reaction between  -
(a)  when sodium bicarbonate is added to water it gives sodium hydroxide (strong base). As a result, the solution becomes alkaline in nature. (b) Because their oxides are themselves are a very strong reducing agent in nature. So, by chemical reduction, we cannot obtain alkali metals. Also, we cannot use electrolysis of the aqueous solution method because after liberating the metals they again...
(a) As we know that down the group ionic size increases. Lithium-ion is the smallest in size and we know smaller the size of ion, the more hydrated it is. So lithium ion is most hydrated and ion is bigger in size so it is least hydrated. Greater the size of hydrated ion less is mobility. So that the order of mobility of ions (b) Lithium unlike other alkali metals direct react with nitrogen...
(i) When sodium metal dropped into water it reacts rapidly and forms sodium hydroxide and hydrogen gas. the chemical reaction is -  (ii) sodium metal heated in the free supply of water-  Sodium reacts vigorously with oxygen and forming sodium peroxides. Reaction-  (iii) when sodium peroxide dissolved in water it hydrolysed and produce sodium hydroxide and hydrogen peroxide. Reaction-  
Significance of sodium potassium, magnesium and calcium in biological fluids- Sodium- It is mainly found in blood plasma and also in the interstitial fluid which surrounds the cell.  ions help in the transmission of nerve signals also for the regulating water in the plasma membrane. Also for the transport of sugars and amino acids into the cells. Potassium-  These ions are highly present...
Both  ion and  ion are smaller in size. So their size compatibility is very high. Hence lattice energy during formation is very high and it is not overcome by the hydration energy. Therefore LiF is almost insoluble in water. On the other hand, cation and  anion have comparable size differences, therefore they have low lattice energy and because of small in size, lithium ion has high polarising...
Lithium-ion is the smallest among the other alkali metal ions. Hence it has higher polarising power than others and so it can polarise water molecule more easily than other alkali metals. Hence the water molecules are more attracted towards Li salts as the water of crystallisation. Li+ has a maximum degree of hydration and for this reason, lithium salts are mostly hydrated, e.g., LiCl· 2H2O  As...
(i) Limestone-  The chemical formula is .  Importance of limstone is- It is used as a building material in the form of marble and in the manufacture of quick lime Calcium carbonate along with magnesium carbonate is used as a flux in the extraction of metals such as iron.  It is also used as an antacid, mild abrasive in tooth paste, a constituent of chewing gum, and a filler in...
The atomic size of sodium and potassium is lager than the magnesium and calcium. So, the lattic energy of carbonates and oxides formed by sodium and potassium are less than that of calcium and magnesium. Therefore the carbonates and oxides of  and  are dissolve readily in water and Mg and  are sparingly soluble in water  
Answer- structure of  in solid phase- In Gaseous phase-

It is an important primary material for manufacturing cement and is cheapest form of alkali    

Which is used in the manufacturing of sodium carbonate from caustic soda

Employed in the purification of sugar and in the manufacture of dye stuffs

 

(i) Magnesium is more electropositive and burns with dazzling brilliance in the air to give MgO and Mg3N.   (ii) Quick lime combined with silica to form calcium silicate which is used as slag. (iii) when chlorine reacts with slaked lime it produces bleaching powder. (iv) when calcium nitrate is heated is decomposed to give calcium
(i) Sodium metal can be extracted from sodium chloride.In this process electrolysis of fused (40%) and (60%) at a temp. of 1123K in Downs cell. steel cathode and graphite block is act as anode. sodium and calcium deposit at cathode .   (Molten state) At Cathode- At Anode-         (ii)  can be prepared by the electrolysis of sodium chloride. By Castner- kellner process.  A brine solution is...
(a) Nitrates- Alkali and alkaline earth metal nitrates are soluble in water. Down the group thermal stability of nitrates increases. Nitrates of alkaline and alkali metals give corresponding nitrites except for lithium nitrate, it gives lithium oxides.    [ M = Be, Mg, Ca, Sr, Ba] (b) Carbonates- Alkaline earth metal carbonates decompose on heating gives carbon dioxide and oxide. On the other...
As we go down the group the electropositive nature of alkali metals increases. And because of that, there is an increase of stability of carbonates. But carbonates of lithium is not stable because lithium carbonate is covalent. Lithium-ion is smaller in size so it can polarise the negative carbonate ion, leading to the formation of more stable lithium oxide. therefore, Lithium decomposes at the...
Solvay process cannot be used to prepare potassium carbonate because unlike sodium bicarbonate,  is fairly soluble in water and does not precipitate out.
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