Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 |
|
|
Ionization enthalpies as compared to gp. 1 elements |
First IE higher Second IE lower |
|
|
|
Hydration enthalpy |
Decreases down the group More than Group 1 |
|
|
|
Color of Flame |
Li, Mg - Electrons tightly bound hence can't get excited Ca - Brick Red Sr - Crimson Ba - Apple Green |
|
|
|
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 |
|
|
|
Reaction with Hydrogen |
MH2 (except Be) BeCl 2 + LiAlH4 ----> BeH2 |
|
|
|
Reaction with liq NH3 |
Deep Blue Black Solutions |
|
|
|
Nature of Oxides |
Rock salt structure (except BeO) BeO - covalent, others ionic BeO - amphoteric, others basic |
|
|
|
Nature of Hydroxides |
Sparingly soluble Be(OH)2 - amphoteric |
|
|
|
Thermal Stability of Hydroxides |
Increases Down the group |
Same as basic character |
|
|
Solubility of Hydroxides |
Increases down the group |
Same as basic character |
|
|
Nature of Halides |
Ionic except Be. BeCl2 - dimer in vapour state |
|
|
|
Trends of Carbonates |
Solubility decreases Thermal Stability increases |
|
|
|
Sulphates |
Thermally stable Solubility decreases |
|
|
|
Nitrates (Preparation and Decomposition) |
Prep : Carbonates + dil.nitric acid Decomposition: Nitrate ---> Oxide + NO2 + O2 (like Li) |
|
|
|
Attack by acids |
Be not readily attacked because of protective oxide film Others release hydrogen |
Be shows diagonal rel with Al |
|
|
Quick Lime (CaO) |
Prep: CaCO3 decomposition by heat Exposure to air: absorbs moisture and CO2 |
|
|
|
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 |
|
|
|
Calcium Carbonate |
Prep: 1. Slaked lime + carbon dioxide 2. Calcium chloride + sodium carbonate |
|
|
|
Plaster of Paris (CaSO4.1/2H2O) |
Prep: Gypsum (CaSO4.2H2O) is heated Above 393K heating gypsum gives dead burnt plaster(anhydrous calcium sulphate) |
|
|
|
Calcium carbonate + dil. acid |
Liberates Carbon dioxide |
|
|
|
Milk of lime + chlorine |
Calcium Hypochlorite |
|
