Question

आउट ऑफ प्रीतम बेरिलियम मैग्निशियम एलमुनियम फास्फोरस एंड क्लोरीन विच हैव कंप्लीटेड एंड हाफ कंपलीटली सेल​

Answer 1

⠀⠀ ⠀ ⠀⠀ $\huge{\tt{\red{❥}\green{A}\purple{N}\pink{S}\blue{W}\orange{E}\red{R}}}$

The second ionization energy of sulphur is greater than that of chlorine because after removing of 1st electron it gets extra stability due to half-filled configuration. 

But as after removal of the third electron, P gets extra stability due to full filled s orbitals so third ionization energy of phosphorus is lower than that of aluminium.

The first ionization energy of aluminium is approximately the same as that of gallium due to similar charge density.

The second ionization energy of boron is greater than that of carbon because in case of B 2nd electron has to be removed from filled 2s orbitals.