| પ્રયોગ | $\frac{[ X ]}{ mol \;L ^{-1}}$ | $\frac{[ Y ]}{ mol\; L ^{-1}}$ | $\frac{\text { Initial rate }}{ mol\; L ^{-1}\; min ^{-1}}$ |
| $I$ | $0.1$ | $0.1$ | $2 \times 10^{-3}$ |
| $II$ | $.2$ | $0.2$ | $4 \times 10^{-3}$ |
| $III$ | $0.4$ | $0.4$ | $M \times 10^{-3}$ |
| $IV$ | $0.1$ | $0.2$ | $2 \times 10^{-3}$ |
$M$ મૂલ્યનો સંખ્યાત્મક ગુણોત્તર $........$ છે. (નજીકનો પૂર્ણાંક)
Using $I$ and $II$
$\frac{4 \times 10^{-3}}{2 \times 10^{-3}}=\left(\frac{ L }{0.1}\right) \Rightarrow L =0.2$
Using $I$ and $III$
$\frac{M \times 10^{-3}}{2 \times 10^{-3}}=\frac{0.4}{0.1} \Rightarrow M=8$
$\frac{ M }{ L }=\frac{8}{0.2}=40$
Ans. $40$
( $R =$ મોલર વાયુ અચળાંક $= 8.314\,JK^{-1}\,mol^{-1}$ )
આપેલ : $\log 2=0.3010,\log 3=0.4771,\log 5=0.6989$
(આપેલ : $\ln 10=2.303\,\log 2=0.3010$ )
$C{l_{2(aq)}} + {H_2}{S_{(aq)}} \to {S_{(S)}} + 2H_{(aq)}^ + + 2Cl_{(aq)}^ - $ માટે વેગ $= K[Cl_2][H_2S]$ છે તો કયો તબક્કો વેગ સમીકરણ સાથે સુસંગત છે ?
$(A)$ $Cl_2 + H_2S \rightarrow H^++ Cl^- + Cl^+ + HS^-$ (ધીમો); $ Cl^+ + HS^- \rightarrow H^++ Cl^- + S$ (ઝડપી)
$ (B)$ $H_2S $ $\rightleftharpoons$ $ H^+ + HS^-$ (ઝડપી સંતુલન) ; $Cl_2 + HS^- \rightarrow 2Cl^- + H^+ + S $ (ધીમો)
$2 \mathrm{HI}_{(\mathrm{g})} \rightarrow \mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})}$
પ્રક્રિયાનો ક્રમ................ છે.
| $1$ | $2$ | $3$ | |
| $\mathrm{HI}\left(\mathrm{mol} \mathrm{L}^{-1}\right)$ | $0.005$ | $0.01$ | $0.02$ |
| Rate $\left(\mathrm{mol} \mathrm{L}^{-1} \mathrm{~s}-1\right)$ | $7.5 \times 10^{-4}$ | $3.0 \times 10^{-3}$ | $1.2 \times 10^{-2}$ |