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22 Cards in this Set
- Front
- Back
- 3rd side (hint)
Group 2 element that isn't an Alkaline Earth Metal |
Beryllium |
Usually first elements show exceptions |
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Ionization enthalpies as compared to gp. 1 elements |
First IE higher Second IE lower |
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Hydration enthalpy |
Decreases down the group More than Group 1 |
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Color of Flame |
Li, Mg - Electrons tightly bound hence can't get excited Ca - Brick Red Sr - Crimson Ba - Apple Green |
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Reaction with air and water |
Be, Mg - Protective oxide layer Powdered Be - Burns brilliantly in air. Powdered Mg - Burns with a dazzling brilliance. Ca, Sr, Ba - burn readily On burning in air, MO and M3N2 formed In water, M(OH)2 with increasing vigor |
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Reaction with Hydrogen |
MH2 (except Be) BeCl 2 + LiAlH4 ----> BeH2 |
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Reaction with liq NH3 |
Deep Blue Black Solutions |
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Nature of Oxides |
Rock salt structure (except BeO) BeO - covalent, others ionic BeO - amphoteric, others basic |
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Nature of Hydroxides |
Sparingly soluble Be(OH)2 - amphoteric |
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Thermal Stability of Hydroxides |
Increases Down the group |
Same as basic character |
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Solubility of Hydroxides |
Increases down the group |
Same as basic character |
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Nature of Halides |
Ionic except Be. BeCl2 - dimer in vapour state |
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Trends of Carbonates |
Solubility decreases Thermal Stability increases |
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Sulphates |
Thermally stable Solubility decreases |
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Nitrates (Preparation and Decomposition) |
Prep : Carbonates + dil.nitric acid Decomposition: Nitrate ---> Oxide + NO2 + O2 (like Li) |
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Attack by acids |
Be not readily attacked because of protective oxide film Others release hydrogen |
Be shows diagonal rel with Al |
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Quick Lime (CaO) |
Prep: CaCO3 decomposition by heat Exposure to air: absorbs moisture and CO2 |
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Slaked Lime (Ca(OH)2) |
Prep: Quick Lime + Water Aq. solution = lime water Suspension in water = Milk of lime Excess carbon dioxide passed = calcium bicarbonate |
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Calcium Carbonate |
Prep: 1. Slaked lime + carbon dioxide 2. Calcium chloride + sodium carbonate |
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Plaster of Paris (CaSO4.1/2H2O) |
Prep: Gypsum (CaSO4.2H2O) is heated Above 393K heating gypsum gives dead burnt plaster(anhydrous calcium sulphate) |
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Calcium carbonate + dil. acid |
Liberates Carbon dioxide |
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Milk of lime + chlorine |
Calcium Hypochlorite |
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