$\dfrac{W}{E} = \dfrac{1 × 60}{96500}$

$=\dfrac{6}{9650}$ = no. of mole e^–

no. of e^– = $\dfrac{6}{9650}$ × 6.02 × 10²³

= 3.75 × 10²⁰

H₃BO₃ + H₂O ⇋ B(OH)–
4 + H⁺

H₃BO₃ is Lewis acid and accept OH^– from H₂O and releases H⁺.

maximum C.N. of Al⁺³ is six so it forms $AlF_6^{3–}$

E0
Zn⁺² / Zn = – 0.76 V

E0
Fe⁺² / Fe = – 0.76 V

Zn has higher negative SRP (Standard reduction potential) so it works as anode and protect iron to make iron as cathode.

Lewis base → l.p donar

isoelectronic - same valence electron

isostructural - same structure

(BeH₂)_n beryllium hydride, it is electron deficient and polymer of BeH₂.

Be, Al, Cr are having passive nature with HNO₃

Beryllium salts (BeCl₂) easily hydrolyse.

1^st reaction is not a redox reaction as the oxidation number of elements remains unchanged.

Trans-effect: The intensity of trans-effect depend on increase in rate of substitution of the trans ligand. F^– < NH₃ < Cl^– < Br^– < Ph^– < CH₃^– < CN^–

Ce⁺⁴ is strong oxidising agent and easily convert into Ce⁺³

Eu⁺² exist and behave as reducing agent.

Ln(OH)₃ are basic in nature and as ionic radius decrease, basic nature decreases from Ce to Lu.

Whether all lanthanons are much more reactive than aluminum can’t be said.

Jahn teller effect : This is geometric distortion that occurs in unsymmetrical octahedral complexes for example high spin complexes of (high spin)

Not suitable for friedal-craft Reaction in Benzene. Isopropyl chlrodie is suitable.

All carbon atom is sp² hybridised and its geometry is trigonal planar.

Nylon-6,6 → adipic acid + Hexamethylenediamine

Electron density is maximum on 2nd & 5th carbon because –ve charge present at carbon 2 and 5 so electrophilic substitution reaction take place at 2nd and 5th carbon.