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Gujarati JEE Chemistry : રેડોક્ષ પ્રક્રિયા અને વિદ્યુતરસાયણ

Multiple Choice Questions

51. 25 $bold degree$ સે તાપમાને 2H₂O₍₁₎ + 2e^- $rightwards harpoon over leftwards harpoon$ H_{2 (g.1.0બાર}) + $bold plus bold space bold 2 bold HO to the power of bold minus subscript bold left parenthesis bold aq bold space bold 10 to the power of bold minus bold 7 end exponent bold M bold right parenthesis end subscript bold space bold E bold space bold equals bold space bold minus bold 0 bold. bold 417 bold space bold V$ હોય અથવા 25 સે તાપમાને શુદ્વ પાણીનો રિડક્શન પોટૅન્શિયલમાં -0.417 V હોય, તો આ પ્રક્રિયાનો E⁰કેટલો હશે ?

0.41 V
-0.817 V
-0.83 V
-2.62 V

52.

bold 2 bold H subscript bold 2 bold O subscript bold left parenthesis bold 1 bold right parenthesis end subscript bold space bold rightwards harpoon over leftwards harpoon bold space bold O subscript bold 2 bold left parenthesis bold g bold. bold 1 bold. bold 0 bold space bold બ ા ર bold right parenthesis end subscript bold space bold plus bold space bold 4 bold H subscript bold left parenthesis bold aq bold right parenthesis end subscript bold space bold plus bold space bold 4 bold e to the power of bold minus bold space

પ્રક્રિયાનો પ્રમાણિત પોટૅન્શિયલ -1.23V 25 $degree$ સે તાપમાને જો $bold left square bracket bold H bold space bold right square bracket bold space bold equals bold space bold 10 to the power of bold minus bold 7 end exponent bold space bold M$ હોય, તો આ પ્રક્રિયાનો પોટૅન્શિયલ કેટલો હશે ? અથવા 25 $bold degree$ સે તાપમાને શુદ્વ પાણીનો ઑક્સિડેશન પોટૅન્શિયલ કેટલો થાય ?

0.41 V
-2.62 V
-0.817 V
-0.41 V

-0.817 V

$2 straight H subscript 2 straight O subscript left parenthesis 1 right parenthesis end subscript space rightwards harpoon over leftwards harpoon with space space space space space space space space space space space on top space straight O subscript 2 left parenthesis straight g.1 બ ા ર right parenthesis end subscript space plus space 4 straight H to the power of plus subscript left parenthesis aq right parenthesis end subscript space plus space 4 straight e to the power of minus$ પ્રક્રિયા માટે n = 4, 25 $degree$ સે તાપમાને [H⁺] = 10^-7 M અને પ્રમાણિત પોટૅન્શિયલ = - 1.23 V છે. (પાણીની ઑક્સિડેશન પ્રક્રિયા માટે) પાણીનો ઑક્સિડેશન પોટૅન્શિયલ

$equals space minus space 1 space.23 space minus space fraction numerator 0.059 over denominator 4 end fraction space log space left square bracket straight H to the power of plus right square bracket to the power of 4 space equals space 1.23 space minus space 0.059 space minus space log space left square bracket straight H to the power of plus right square bracket space equals space minus space 1.23 space minus space 0.059 space cross times space log space 10 to the power of negative 7 end exponent space equals space minus space 0.817 space straight V$

53.

$bold E to the power of bold 0 subscript bold Cr to the power of bold 3 bold plus end exponent bold divided by bold Cr end subscript bold equals bold minus bold 0 bold. bold 74 bold space bold V bold comma bold space bold E to the power of bold 0 subscript bold MnO subscript bold 4 to the power of bold minus bold divided by bold Mn to the power of bold 3 bold plus end exponent end subscript bold equals bold 1 bold. bold 51 bold space bold V bold comma bold space bold E to the power of bold 0 subscript bold Cr subscript bold 2 bold O subscript bold 7 superscript bold 2 bold minus end superscript bold divided by bold Cr to the power of bold 3 bold plus end exponent end subscript bold equals bold 1 bold. bold 33 bold space bold V bold comma bold space bold E to the power of bold 0 subscript bold Cl bold divided by bold Cl to the power of bold minus end subscript bold equals bold 1 bold. bold 36 bold space bold V bold space$ આપેલ માહિતીને આધારે નીચેનામાંથી કયો પ્રબળ ઑક્સિડેશનકર્તા છે ?

Cr³
Cl^-
MnO₄^-
Mn²⁺

54. 25 $bold degree$ સે તાપમાને $bold Fe subscript bold left parenthesis bold s bold right parenthesis end subscript bold space bold plus bold space bold 2 bold Ag subscript bold left parenthesis bold aq bold space bold 0 bold. bold 5 bold space bold M bold right parenthesis end subscript bold space bold rightwards harpoon over leftwards harpoon bold space bold Fe to the power of bold 2 subscript bold left parenthesis bold aq bold space bold 0 bold. bold 1 bold M bold right parenthesis end subscript bold space bold plus bold space bold 2 bold Ag subscript bold left parenthesis bold s bold right parenthesis end subscript bold space$ પ્રક્રિયાનો E_cellઅને સંતુલન અચળાંક અનુક્રમે કેટલા છે ? $bold left parenthesis bold E to the power of bold 0 subscript bold Fe to the power of bold 2 bold plus end exponent bold vertical line bold space bold Fe bold space end subscript bold equals bold space bold 0 bold. bold 44 bold space bold V bold comma bold space bold E to the power of bold 0 subscript bold Ag to the power of bold plus bold vertical line bold Ag end subscript bold space bold equals bold space bold 0 bold. bold 80 bold space bold V bold right parenthesis$

$1.23 space straight V comma space 1.507 space cross times space 10 to the power of 12 space straight M to the power of negative 1 end exponent$
$1.25 space straight V comma space 1.081 space cross times space 10 to the power of 42 space straight M to the power of negative 1 end exponent$
$1.23 space straight V comma space 1.246 space cross times space 10 to the power of 6 space straight M to the power of negative 1 end exponent$
આપેલ પૈકી એક પણ નહી.

55.

298 K તાપમાને $bold Cd subscript bold left parenthesis bold s bold right parenthesis end subscript bold space bold plus bold space bold Sn to the power of bold 2 bold plus end exponent subscript bold left parenthesis bold aq bold right parenthesis end subscript bold space bold rightwards harpoon over leftwards harpoon bold space bold Cd to the power of bold 2 bold plus end exponent subscript bold left parenthesis bold aq bold right parenthesis end subscript bold space bold plus bold space bold Sn subscript bold left parenthesis bold s bold right parenthesis end subscript$ પ્રક્રિયાનો સંતુલન અચળાંક $bold K bold space bold equals bold space bold e to the power of bold 20 bold. bold 2537 end exponent bold space bold left parenthesis bold n bold space bold equals bold space bold 2 bold right parenthesis$ હોય, તો આ પ્રક્રિયાનો પ્રમાણિત પોટૅન્શિયલ કેટલો હશે ?

(R = 8.314 જુલ $times$ મોલ^-1. કેલ્વિન^-1, F = 96500 કુલમ્બ $times$ મોલ^-1)

0.13 V
0.48 V
0.26 V
0.52 V

56.

bold Mg bold space bold vertical line bold space bold Mg to the power of bold 2 subscript bold left parenthesis bold c bold space bold M bold right parenthesis end subscript bold space bold vertical line bold vertical line bold space bold Fe to the power of bold 2 subscript bold left parenthesis bold 0 bold. bold 08 bold M bold right parenthesis end subscript bold space bold vertical line bold space bold Fe

કોષના તાપમાનમાં ઘટાડો કરતાં કોષ- પોટૅન્શિયલ સૈદ્વાંતિક રીતે વધે છે, તો c નું કયું મૂલ્ય શક્ય છે ?

c = 0.04
c = 0.02
c = 0.05
c = -0.05

57.

25 $degree$ સે તાપમાને $bold Mg bold space bold vertical line bold space bold Mg to the power of bold 2 subscript bold left parenthesis bold 0 bold. bold 2 bold M bold right parenthesis end subscript bold space bold vertical line bold vertical line bold space bold H subscript bold left parenthesis bold XM bold right parenthesis end subscript bold space bold vertical line bold space bold H subscript bold left parenthesis bold XM bold right parenthesis end subscript bold space bold vertical line bold space bold H subscript bold 2 bold left parenthesis bold g bold. bold 1 bold. bold 0 bold space bold બ ા ર bold right parenthesis end subscript bold space bold vertical line bold space bold Pt$ કોષ માટે E_cell નાં મૂલ્યો અનુક્રમે 2.3629 V અને 2.36 V હોય, તો X = .........

0.25 M
0.1 M
0.5 M
0.4 M

58. $bold Zn bold space bold vertical line bold space bold Zn to the power of bold 2 subscript bold left parenthesis bold C subscript bold 1 bold right parenthesis end subscript bold space bold vertical line bold vertical line bold space bold Sn to the power of bold 2 subscript bold left parenthesis bold C subscript bold 1 bold right parenthesis end subscript bold space bold vertical line bold space bold Sn bold space bold left parenthesis bold c subscript bold 1 bold space bold less than bold space bold c subscript bold 2 bold right parenthesis bold space$ કોષના તાપમાનમાં ઘટાડો કરતાં કોષ- પોટૅન્શિયલમાં સૈદ્વાંતિક રીતે કયો ફેરફાર થશે ?

વધશે.
ફેરફાર ના થાય.
ઘટશે.
કહી ના શકાય.

59. 25 $bold degree$ સે તાપમાને એક વિદ્યુતરાસાયણિક કોષમાં થતી પ્રક્રિયા માટે Kc = 1.3141 $bold cross times$ 10¹⁰⁷M^-1 અને n = 2 હોય, તો તે કોષ માટે E⁰_Cell કેટલો થાય ?

3.16 V
2.71 V
0.1186 V
6.32 V

60. $bold Zn bold space bold vertical line bold space bold Zn to the power of bold 2 subscript bold left parenthesis bold 0 bold. bold 050 bold M bold right parenthesis end subscript bold space bold vertical line bold space bold Co to the power of bold 2 subscript bold left parenthesis bold 0 bold. bold 08 bold M bold right parenthesis end subscript bold space bold vertical line bold space bold Co$ કોષના તાપમાનમાં વધારો કરતાં કોષ- પોટૅન્શિયલમાં સૈદ્વાંતિક રીતે કયો ફેરફાર થશે. ?

ઘટશે.
વધશે.
ફેરફાર ના થાય.
કહી ના શકાય.

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Gujarati JEE Chemistry : રેડોક્ષ પ્રક્રિયા અને વિદ્યુતરસાયણ

Multiple Choice Questions

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