Class 12th

Correct order of increasing field strength of ligands is : I– < OH– < NCS–

Correct order of basic strength in aqueous medium is

${\left(C{H}_3\right)}_{2}NH>C{H}_{3}N{H}_2>{\left(C{H}_3\right)}_{3}N>N{H}_3$

Kindly consider the following figure

EAN = Atomic No. – Oxidation state + 2 * CN

= 26 – 2 + 2 * 6

= 36.

HBrO2 has least existence

Kindly consider the following figure

Hydroboration oxidation : The reaction proceeds in an anti Markovnikov manner

=> No rearrangement is possible

Fe₃O₄ is a ferromagnetic substance

Malachite : CuCO3.Cu (OH)2

Azurite : 2CuCO3.Cu (OH)2

Cuprite : Cu₂O

Copper pyrite : Cu₂S.Fe₂S₃.

For BCC unit cell

$\sqrt[]{3}a=4r$

$a=\frac{4r}{\sqrt[]{3}}$