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Question
S-block element are very reactive in nature.they form various compounds .The order of thermal stability / solubility in water of different compounds are given.Choose the incorrect order.
S-block element are very reactive in nature.they form various compounds .The order of thermal stability / solubility in water of different compounds are given.Choose the incorrect order.
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Solution
The correct option is C Li2CO3>Na2CO3>K2CO3>Rb2CO3>Cs2CO3(solubility in water)
The s-block is one of the four blocks of elements from the periodic table. All the elements of s-block have the election in their most outward electron in the s-orbital. Elements of s-block are in the first two groups. most of the elements of s-block are metals except hydrogen. s-block elements lose electrons easily. these metals are shiny, slivery and good conductors of heat and electricity. The oxides of calcium, strontium, and barium are basic and the hydroxides are strongly basic. The solubilities of hydroxides in water is Be(OH)2<Mg(OH)2<Sr(OH)2<Ba(OH)2Metal oxide basicity Group II metal oxides become more basic as we go down the column. This trend is also seen in the electronegativity of group II metals.Solubility of hydroxidesGroup II metal hydroxides are more soluble in water as we go down the column. This is due to a decrease in lattice energy of hydroxide salt and an increase in the coordination number of the metal ion.The solubility of sulfatesthe sulfates are less soluble as we go down the group.the solubility of carbonatesThe carbonates become less soluble down the group. Carbonates of group 2 are sparingly soluble.
The s-block is one of the four blocks of elements from the periodic table. All the elements of s-block have the election in their most outward electron in the s-orbital. Elements of s-block are in the first two groups. most of the elements of s-block are metals except hydrogen. s-block elements lose electrons easily. these metals are shiny, slivery and good conductors of heat and electricity. The oxides of calcium, strontium, and barium are basic and the hydroxides are strongly basic. The solubilities of hydroxides in water is Be(OH)2<Mg(OH)2<Sr(OH)2<Ba(OH)2
Metal oxide basicity
Group II metal oxides become more basic as we go down the column. This trend is also seen in the electronegativity of group II metals.
Solubility of hydroxides
Group II metal hydroxides are more soluble in water as we go down the column. This is due to a decrease in lattice energy of hydroxide salt and an increase in the coordination number of the metal ion.
The solubility of sulfates
the sulfates are less soluble as we go down the group.
the solubility of carbonates
The carbonates become less soluble down the group. Carbonates of group 2 are sparingly soluble.
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