Class 11th

From   $\Delta H=\Delta G+T\Delta S\therefore \Delta S=\frac{\Delta H-\Delta G}{T}$

$\therefore$ $\Delta S=\left[\frac{51.4-\left(-49.4\right)}{300}\right]*1000J{K}^{-1}mo{l}^{-1}=336J{K}^{-1}mo{l}^{-1}$

Total wt = 4gm = W_NaOH + $W_{N{a}_{2}C{O}_3}$  

Let us suppose moles are 'm' for each.

4 = 40m + 106m

$\therefore m=\left(\frac{4}{146}\right)$ moles of NaOH and Na₂CO₃ each .

$\therefore$ Mass of NaOH (x gm) = $\frac{4}{146}*40=1.095\approx 1.0$

$\left[C{l}^{-}\right]=10^{-1}M$

$\left[Cr{O_4}^{--}\right]=10^{-3}M$

for AgCl ppt¹, ${\left[A{g}^{+}\right]}_{req}=\frac{1.7*10^{-10}}{10^{-1}}M$  

For Ag₂CrO₄ppt², ${\left[A{g}^{+}\right]}_{req}=\sqrt[]{\frac{1.9*10^{-12}}{10^{-3}}}M$

${\left[A{g}^{+}\right]}_{req}=4.3*10^{-5}M$

Being lower concentration of [Ag⁺] in case of AgCl, it will precipitate first.

Regarding industrial consumption of H₂ manufacturing of NH₃ is the largest applications.

B (OH)₃ is orthoboric acid having acidic nature, while Al (OH)₃ has amphoteric nature that is acidic and as well as basic

B (OH)₃ is orthoboric acid having acidic nature, while Al (OH)₃ has amphoteric nature that is acidic and as well as basic

Nowdays liquid CO₂ used as washing clothes, because Cl₂ and C₂H₂Cl₄ are toxic

An alkali metal oxide of formula MO₂ is super oxide which is formed by K and Rb. KO₂ has pale yellow colour and paramagnetic nature, while alkaline earth metal oxides formula MO₂ are peroxide and diamagnetic nature.

Only (A) and (B) structures have resonance effect. In (A) benzyllic resonance and in (B) allylic resonance of carbocation.