Chemistry

[Mn (CN)? ]³? → Mn³? i.e 3d? → t? g? , eg? (d²sp³), CN? is strong field ligand.
[Fe (CN)? ]³? → Fe³? i.e 3d? → t? g? , eg? (d²sp³), CN? is strong field ligand.
[Co (C? O? )? ]³? → Co³? i.e, 3d? → t? g? , eg? (d²sp³), C? O? ²? is strong field ligand.
[MnCl? ]? → Mn³? = 3d? → t? g²¹¹¹, eg¹¹? (4 unpaired e? ), Cl? is weak field ligand.
[FeF? ]³? → Fe³? = 3d? → t? g³¹¹, eg²¹¹ (5 unpaired e? ) F? is strong field ligand.
∴ S? and S? are true.

Order of 1st I. E is Al < Mg < S < P

Radioactive isotope of hydrogen is tritium (³H)
Number of neutron = 3 - 1 = 2
Number of electron = 1

In hexagonal unit cell, the shortest distance between two identical layers is
(2√2x) / √3 [x = edge length]

h = (2√2x) / √3

Correct order : Na? > Li? = Mg? > Be²?

$C{H}_4+2O_2\to C{O}_2+2H_{2}O$

2 moles of water produced by 1 mole of methane

Or 36 gm of water produced by 1 mole of CH₄

$\therefore$  81 gm of water produced = $\frac{1*81}{36}$  = 2.25 mole of CH₄

Mole of CH₄ required = 225 * 10^-2

the nearest integer = 225

C? H? + 5O? → 3CO? + 4H? O
ΔH = − {6 (C = O) + 8 (OH)} + 2 (C – C) + 8 (C – H) + 5 (O = O)
= 8a? + 5a? + 2a? - 6a? - 8a?

${\left[Co{\left(H_{2}O\right)}_6\right]}^{2+}+N{H}_{3\left(excess\right)}\to \underset{Diamagneticnature}{{\left[Co{\left(N{H}_3\right)}_6\right]}^{3+}+6H_{2}O}$

$C{o}^{3+}\to 3d^{6}4s^0$

$\Rightarrow {t_{2g}}^{6}e{g}^0$

$\Rightarrow {t_{2g}}^{6}e{g}^0$ (form of paired electron)

              No. of electron in t_2g = 6

Cl? > F? > O? > N?
3p-3p 2p-2p B.O=2 B.O=3