Chemistry NCERT Exemplar Solutions Class 11th Chapter Fourteen

$F{e}^{+3}+3e^{-}\to Fe$

3 Faraday is required to deposit 1 mole Fe

 $?56g$  deposited by   $3*96500$ C charge

$\therefore 0.3482g$ deposited by $\frac{3*96500}{56}*0.3482C=\frac{100803.9}{56}C=1800.7C$

$\therefore Q=It$

1800.07 = 1.5 t

$\therefore t=1200sec=\frac{120\cancel{0}}{6\cancel{0}}$ min = 20 min 

t1/2 = 340 secP0 = 55.5 kPa

t1/2 = 170 sec P0 = 27.8 kPa

$\therefore t_{1/2}\propto {\left(P_0\right)}^{1-n}$

$\therefore 1-n=1n=0$

$\therefore$ zero order reaction

  $F-Be-F$   $\mu =0$ $$

BF3 $\mu =0$

H2O $\mu \ne 0$ $$

NH3 $\mu \ne 0$ $$

CCl4 $\mu =0$ $$

HCl $\mu \ne 0$ $$

$T_1=27°C=300K$ T2 = 45° C = 45 + 273 = 318 K

P1 = 30 atmP2 =?

V is constant due to rigid tank\

$\therefore \frac{P_1}{T_1}=\frac{P_2}{T_2}$

$\frac{30}{300}=\frac{P_2}{318}\therefore P_2=\frac{1}{10}*318=31.8atm\approx 32atm$

$?$ 0.30 gm glycine is present in 100 gm protein

$\therefore$ 75 gm glycine is present in $\frac{100}{0.30}*75=\frac{1000\cancel{0}}{3\cancel{0}}*75=25*10^{3}g/mol$

This is a Matching Type Questions as classified in NCERT Exemplar

(i)→ (a), (d); (ii)→ (c); (iii)→ (a); (iv)→ (b)

This is a Matching Type Questions as classified in NCERT Exemplar

(i)→ (e); (ii)→ (d); (iii)→ (a); (iv)→ (b) ; (v)→ (c)

This is a Matching Type Questions as classified in NCERT Exemplar

(i)→ (d); (ii)→ (e); (iii)→ (a); (iv)→ (c) ; (v)→ (b)

This is a Matching Type Questions as classified in NCERT Exemplar

(i)→ (c); (ii)→ (d); (iii)→ (b); (iv)→ (a)

This is a Multiple choice Questions as classified in NCERT Exemplar

Options (i) and (ii) are correct since 75% of the solar energy reaching the earth is being absorbed by the earth's surface and this increases its temperature. The rest of the heat radiates back to the atmosphere. The average global temperature will increase to a level, and this leads to melting of polar ice caps and flooding of low-lying areas all over the earth. Increase in the global temperature increases the incidence of inectious diseases like malaria, dengue,   yellow fever etc.