(c) ) Li Be B Mg A l Si Option (b) ) ionic character (difference in electronegativity) MI < MBr < MCl < MF Option (b) ) Castner's process NaOH Na + + OH – Cathode : Na + + e – → Na Anode : 2OH – → H O + /2O + 2e – Option (a) ) CaC N Ca CN o C Calciumcyanide → ( ) Option (c) ) (a) MgCl The order of hydration energy of alkaline earth metal is Be + > Mg + > Ca + > Sr + > Ba + . (p) sodium –yellow ( ) (q) Calcium – Brick red ( ) (r) Barium – apple green ( ) (s) Strontium – Crimson red ( ) (t) Cesium – blue ( ) (u) Potassium – Violet ( ) Option (a) . (d) Among alkali and alkaline earth metals, K, Rb and Cs alone forms superoxides. Superoxide O – has electron bond.
. (a) both are true and reason is the correct explanation of assertion. . Solubility of carbonates decreases down the group and hence the correct order of solubility is, (b) MgCO > CaCO > SrCO > BaCO ) Correct Statement: Beryllium salts are easily hydrolysed option (c) ) Slaked lime Ca(OH) The suspension is called milk of lime and the clear solution is called lime water.
Option (c) ) NaHCO Na CO H O CO ∆ ↓ → ↑ (Soluble in water) 2HCl NaCl + H O + CO ↑ Correct option (b) 11th Std Chemistry 11th Std Chemistry - - - - ) CaCO CaO CO x Colourlessgas CalciumOxide residue ∆