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Gujarati JEE Chemistry : રેડોક્ષ પ્રક્રિયા અને વિદ્યુતરસાયણ

Multiple Choice Questions

71.

 

25degree àª¸à«‡ તાપમાને bold Co subscript bold left parenthesis bold s bold right parenthesis end subscript bold space bold plus bold space bold Ni to the power of bold 2 subscript bold left parenthesis bold aq bold space bold 0 bold. bold 1 bold space bold M bold right parenthesis end subscript bold space bold rightwards harpoon over leftwards harpoon bold space bold Co to the power of bold 2 subscript bold left parenthesis bold aq bold space bold 0 bold. bold 01 bold space bold M bold right parenthesis end subscript bold space bold plus bold space bold Ni subscript bold left parenthesis bold s bold right parenthesis end subscript àªªà«àª°àª•à«àª°àª¿àª¯àª¾ સંતુલનમાં આવે, ત્યારે Ni2 ની સાંદ્વતામાં કેટલા ટકા ઘટાડો થયો હશે ? bold left parenthesis bold E to the power of bold 0 subscript bold Co to the power of bold 2 bold plus end exponent bold vertical line bold Co end subscript bold space bold vertical line bold equals bold space bold minus bold 0 bold. bold 28 bold V bold space bold અન ે bold space bold minus bold 0 bold. bold 23 bold space bold V bold right parenthesis 

  •  

    92.5  %

  •  

    97.28 %

  •  

    8.74 %

  •  

    92.2 %


72.

 

50degree àª¸à«‡ તાપમાને Ph | H2(g.1.0 બાર) | OH- àª…ર્ધ-કોષના E0OXનું મૂલ્ય +0.83 V હોય, તો 50degree àª¸à«‡ àª¤àª¾àªªàª®àª¾àª¨à«‡ પાણીના આયોનીય ગુણાકાર (KW)નું મૂલ્ય કેટલું થાય ?

  •  

    1.105 × 10-12

  •  

    1.0 × 10-14

  •  

    1.12 × 10-13

  •  

    1.102 × 10-12


73.
Co | Co3, CO2 | Co3, Fe | Fe3, Fe2 | Fe3અર્ધ-કોષના પ્રમાણિત પ્રમાણિત ઑક્સિડેશન- પોટૅન્શિયલ અનુક્રમે -04167 V, -1.81 V, 0.0367 V, -0.77 V છે. તો Fe | Fe2 || Co2 | Coકોષનો પ્રમાણિત પોટૅન્શિયલ કેટલો થાય ?
  • 1.0 V

  • -0.11 V

  • 0.16 V

  • 0.72 V


74.
25degree સે તાપમાને Sn | Sn2(0.1 M) || Pb2(0.5 M) | Pb વિદ્યુતરાસાયણિક કોષમાં સંતુલન સ્થપાય ત્યારે ડા.બા.ના અર્ધકોષનો ઑક્સિડેશન પોટૅન્શિયલ કેટલો હશે ? bold left parenthesis bold E to the power of bold 0 subscript bold Sn to the power of bold 2 bold plus end exponent bold vertical line bold Sn end subscript bold space bold equals bold space bold minus bold 0 bold. bold 14 bold V bold comma bold space bold E to the power of bold 0 subscript bold Pb to the power of bold 2 bold plus end exponent bold vertical line bold Pb end subscript bold space bold equals bold space bold minus bold 0 bold. bold 13 bold space bold V bold right parenthesis
  • 0.151 V

  • 0.114 V

  • 0.0 V

  • 0.128 V


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75.

298 K તાપમાને Co | Co2(1.0M) || Ni2(XM) | Ni કોષમાં થતી પ્રક્રિયા સંતુલનમાં છે, તો x = .......... . bold E to the power of bold 0 subscript bold Co to the power of bold 2 bold plus end exponent bold vertical line bold Co end subscript bold space bold equals bold space bold minus bold 0 bold. bold 28 bold space bold V bold space bold અન ે bold space bold E to the power of bold 0 subscript bold Ni to the power of bold 2 bold plus end exponent bold vertical line bold Ni end subscript bold space bold equals bold space bold minus bold 0 bold. bold 23 bold space bold V છે. (n = 2)

  • 0.5 M

  • 0.02 M

  • 1.02 M

  • 1.0 M


76. Fe | Fe2(0.1 M) || Cd2(0.5 M) | Cd વિદ્યુતરાસાયણિક કોષમાં 298 K તાપમાને સંતુલન સ્થપાય ત્યારે ઍનોડ અને કૅથોડના રિડક્શન પોટૅન્શિયલ મૂલ્યો કેટલાં હશે ? (n = 2) (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 end subscript bold space bold equals bold space bold minus bold 0 bold. bold 44 bold space bold V અને bold E to the power of bold 0 subscript bold Cd to the power of bold 2 bold plus end exponent bold space bold vertical line bold space bold Cd end subscript bold space bold equals bold space bold minus bold 0 bold. bold 40 bold space bold V છે.)
  • -0.575 V

  • +0.477 V

  • -0.447 V

  • -0.477 V


77.

 

Fe | Fe2 અને Fe2 | Feઅર્ધ કોષો માટે E0red અનુક્રમે -0.44 V અને +0.77 છે, તો Fe | Fe3 અર્ધ-કોષ માટે E0OX નું મૂલ્ય આપેલ મૂલ્યો માંથી કયું હશે ?

  •  

    0.33 V

  •  

    -0.33 V

  •  

    0.037 V

  •  

    -0.11 V


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78. 298 K તાપમાને નીચે આપેલા વિદ્યુતરાસાયણિક કોષમાં થતી પ્રક્રિયા સંતુલન સ્થિતિમાં છે, તો કયો વિકલ્પ યોગ્ય છે ?
bold Zn bold space bold vertical line bold space bold Zn to the power of bold 2 subscript bold left parenthesis bold XM bold right parenthesis end subscript bold space bold vertical line bold vertical line bold space bold Cu to the power of bold 2 subscript bold left parenthesis bold yM bold right parenthesis end subscript bold space bold vertical line bold space bold Cu
  • straight E subscript Zn space vertical line Zn to the power of 2 plus end exponent subscript left parenthesis XM right parenthesis end subscript end subscript space plus space straight E subscript Cu to the power of 2 plus end exponent vertical line end subscript Cu space equals space 0.0 space straight V
  • straight E subscript Zn space vertical line space Zn to the power of 2 plus end exponent subscript left parenthesis XM right parenthesis end subscript end subscript space equals space minus straight E subscript Cu to the power of 2 plus end exponent subscript left parenthesis yM right parenthesis end subscript end subscript space vertical line space Cu
  • straight E subscript Zn space vertical line space Zn to the power of 2 plus end exponent subscript left parenthesis XM right parenthesis end subscript end subscript space equals space minus straight E subscript Cu to the power of 2 plus end exponent subscript blank end subscript space vertical line space Cu
  • આપેલ પૈકી કે પણ નહી 


B.

straight E subscript Zn space vertical line space Zn to the power of 2 plus end exponent subscript left parenthesis XM right parenthesis end subscript end subscript space equals space minus straight E subscript Cu to the power of 2 plus end exponent subscript left parenthesis yM right parenthesis end subscript end subscript space vertical line space Cu

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79.

 

bold E to the power of bold 0 subscript bold Cu bold vertical line bold Cu to the power of bold 2 bold plus end exponent end subscript bold space bold equals bold space bold minus bold 0 bold. bold 34 bold space bold V àª…ને bold E to the power of bold 0 subscript bold Cu to the power of bold 2 bold plus end exponent bold vertical line bold Cu to the power of bold plus end subscript bold space bold equals bold space bold plus bold 0 bold. bold 16 bold space bold V àª¹à«‹àª¯, તો bold E to the power of bold 0 subscript bold Cu bold vertical line bold Cu to the power of bold plus end subscript àª¨à«àª‚ મૂલ્ય કેટલું થાય ?

  •  

    -0.52 V

  •  

    +0.48 V

  •  

    -0.48 V

  •  

    -0.12 V


80.
1.0 × 10-3 M સાંદ્વતા ધરાવતા Fe3 ના દ્વાવણમાં વધુ પડતો પ્રવાહી પારો ઉમેરવામાં આવે છે. 25degree સે. તાપમાને 5% Feસંતુલન સમયે બાકી રહે છે. જો ફક્ત નીચે દર્શાવેલી પ્રક્રિયા જ શક્ય બનતી હોય, તો bold E to the power of bold 0 subscript bold Hg to the power of bold 2 bold plus end exponent bold space bold vertical line bold space bold Hg end subscriptની કિંમત કઈ હશે ? bold left parenthesis bold E to the power of bold 0 subscript bold Fe to the power of bold 3 bold vertical line bold Fe to the power of bold 2 bold plus end exponent end subscript bold space bold equals bold space bold 0 bold. bold 77 bold space bold V bold right parenthesis
bold 2 bold Hg subscript bold left parenthesis bold 1 bold right parenthesis end subscript bold space bold plus bold space bold 2 bold Fe to the power of bold 3 subscript bold left parenthesis bold aq bold right parenthesis end subscript bold space bold rightwards harpoon over leftwards harpoon bold space bold Hg subscript bold 2 to the power of bold 2 subscript bold left parenthesis bold aq bold right parenthesis end subscript bold space bold plus bold space bold 2 bold Fe to the power of bold 2 subscript bold left parenthesis bold aq bold right parenthesis end subscript
  • -0.643 V

  • -0.793 V

  • 0.793 V

  • 0.634 V


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