Ncert Solutions Chemistry Class 11th

% of C in organic compound

              $=\frac{12}{14}*\frac{WC{O}_2}{W.O.C.}*100$  

              $=\frac{952.56}{21.648}=44\mathrm{\%}$  

              $\mathrm{\%}ofH=\frac{2}{18}*\frac{W{H}_{2}O}{W.O.C.}*100$  

              = $\frac{20}{18}*\frac{0.4428}{0.492}*100$  

              = $\frac{88.56}{8.856}=10\mathrm{\%}$  

              = 100 – 54 = 46%

$C\mathcal{l}{F}_3$ ® T-shaped (sp³d)

 IF₇ ® Pentagonal bipyramidal (sp³d³)

BrF₅ ® Square pyramidal (sp³d²)

BrF₃ ® T-Shaped (sp³d)

I₂Cl₆ ® Triangular bipyramidal (sp³d)

$I{F}_5\to$  Square Pyramidal (sp³d²)

ClF ® (sp³)

ClF₅ ® Square Pyramidal (sp³d²)

Br₅, IF₅ & ClF₅ ® Square Pyramidal

$2B{F}_3+6NaH\to B_2{H}_6+6NaF$

${\mathrm{B}}_2{\mathrm{H}}_6+2\stackrel{?}{\mathrm{N}}{\left(\mathrm{M}\mathrm{e}\right)}_3\to 2{\mathrm{H}}_3\mathrm{B}\leftarrow :\mathrm{N}{\left(\mathrm{M}\mathrm{e}\right)}_3$

Density of metal a very specific and depends upon many factors.

Li ® 0.53 gm/cm³

Na ® 0.97 gm/cm³

K ® 0.86 gm/cm³

Rb ®1.53 gm/cm³

Cs ® 1.90 gm/cm³

Value of n & $\mathcal{l}$ can't be same

$S{O}_{2}C{l}_2+2H_{2}O\to H_{2}S{O}_4+2HCl$  

Let a moles of SO₂Cl₂ is taken

Then no. of moles of H₂SO₄ = a moles

No. of moles of HCl = 2a moles

No. of moles of NaOH required = 2a + 2a = 4a = 16

$\Rightarrow a=4moles$  

B₂H₆ has 4 2 c -2e bonds and 2 3c-2e bonds.

Bridging (B-H) bonds have more value of bond- length then terminal (B – H) bonds

Bridging bonds are in one plane, but terminal bonds are in perpendicular plane.

Due to presence of (3c-2e) bonds, it behaves as electrons deficient and prone to get attached by  lewis  base.

$3NaB{H}_4+4B{F}_3\underset{}{\overset{\Delta }{\to }}3NaB{F}_4+2B_2{H}_6$

Due to higher extent of polarization by Li⁺ and Mg²⁺, LiCl and Mgcl₂ have covalent character. Therefore they are soluble in ethanol.

 Due to very high value of lattice energy, LiF is having very less solubility in water.

Sphalarite             ZnS

Calamine              ZnCO₃

Galena                  PbS

Siderite                FeCO₃

Acidic oxide Þ Cl₂O₇

Neutral oxide Þ N₂O, NO

Basic oxide Þ Na₂O

Amphoteric oxide Þ As₂O₃