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Gujarati JEE Chemistry : રેડોક્ષ પ્રક્રિયા અને વિદ્યુતરસાયણ

Multiple Choice Questions

31. Zn | Zn²_(0.005M) || Ag_(0.04M) | Ag કોષ માટે ના મૂલ્યને અનુરૂપ Q ના મૂલ્ય માટે કયો વિક્લ્પ યોગ્ય છે ?

n = 4, Q = 0.156M^-2
n = 2, Q = 1.7677M
n = 3, Q = 5.5243 M $blank to the power of bold minus begin inline style bold 3 over bold 2 end style end exponent$
આપેલ પૈકી એક પણ નહી

32.

$bold Pt bold space bold vertical line bold space bold Cl subscript bold 2 bold left parenthesis bold g bold. bold 1 bold. bold 0 bold space bold બ ા ર bold right parenthesis end subscript bold space bold vertical line bold space bold Cl to the power of bold minus subscript bold left parenthesis bold 0 bold. bold 5 bold M bold right parenthesis end subscript bold space bold vertical line bold vertical line bold space bold Au to the power of bold 3 subscript bold left parenthesis bold 0 bold. bold 4 bold M bold right parenthesis end subscript bold space bold vertical line bold space bold Au$ કોષ માટે Q = 20M^-4હોય, તો n = .....

n = 4
n = 3
n = 2
n = 6

33.

25 $degree$ સે તાપમાને Fe | Fe²_(XM) || Ag || Ag_(yM) કોષનો વાસ્તવિક પોટૅન્શિયલ 1.295 V છે. 25 $degree$ સે તાપમાને Fe²_(XM) | Fe નો પોટૅન્શિયલ 0.455 V હોય, તો તાપમાને Ag_(yM) | Ag કોષનો પોટૅન્શિયલ કેટલો હશે ?

3.125 V
0.84 V
-2.135 V
0.84 V

34.

bold Co subscript bold left parenthesis bold s bold right parenthesis end subscript bold space bold plus bold space bold 2 bold Ag to the power of bold 2 subscript bold left parenthesis bold aq 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 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

પ્રક્રિયાનો $bold E to the power of bold 0 subscript bold Cell bold space bold equals bold space bold 1 bold. bold 08 bold space bold V$ છે. જો Co²_(aq) નું સાંદ્વણ બમનું કરવામાં આવે, તો E⁰_Cellમાં શું ફેરફાર થાય ?

બમણો થાય.
કોઈ ફેરફાર ના થાય.
અડધો થાય.
બમણાં કરતાં થોડો ઓછો વધે.

35.

જો $bold E subscript bold Zn to the power of bold 2 bold plus bold left parenthesis bold XM bold right parenthesis bold vertical line bold Zn end exponent end subscript bold space bold less than bold space bold E to the power of bold 0 subscript bold Zn to the power of bold 2 bold plus end exponent bold vertical line bold Zn end subscript$ હોય, તો xની કિંમત કઈ શક્ય છે?

1.2 M
1.0 M
0.2 M
નક્કી ના થઈ શકે.

0.2 M

$straight E degree subscript Zn to the power of 2 plus divided by zm end exponent space less than space space straight E subscript Zn to the power of 2 plus end exponent vertical line Zn end subscript superscript degree space vertical line zn$ આપેલ છે.

હવે $straight E subscript zn to the power of 2 plus divided by zn end exponent end subscript superscript 0 space equals space straight E subscript Zn to the power of 2 plus end exponent vertical line zn end subscript superscript 0 space end superscript space minus space fraction numerator 0.059 over denominator 2 end fraction space log space left parenthesis 1 over straight x right parenthesis$

$therefore space straight E subscript Zn to the power of 2 plus end exponent vertical line Zn end subscript superscript 0 space minus space fraction numerator 0. space space 059 over denominator space space 2 end fraction space space log space left parenthesis 1 over straight x right parenthesis space less than space straight E subscript Zn to the power of 2 plus end exponent vertical line Zn end subscript superscript 0 therefore space minus space fraction numerator 0.059 over denominator 2 end fraction space log space 1 half space less than space 0 space આથ ી space fraction numerator 0.059 over denominator 2 end fraction space log space left parenthesis 1 over straight x right parenthesis space greater than space 0 therefore space log space left parenthesis 1 over straight x right parenthesis space greater than space 0 space therefore space straight x space less than space 1 space therefore space straight x space equals space 0.2 space straight M$

36. $bold Pt bold space bold vertical line bold space bold Br subscript bold 2 bold left parenthesis bold 1 bold right parenthesis end subscript bold space bold vertical line bold space bold Br subscript bold left parenthesis bold C subscript bold 1 bold right parenthesis end subscript superscript bold minus bold space bold vertical line bold vertical line bold space bold Au to the power of bold 3 subscript bold left parenthesis bold C subscript bold 2 bold right parenthesis end subscript bold space bold vertical line bold space bold Au$ વિદ્યુત રાસાયણિક કોષમાં થતી પ્રક્રિયા માટે n અને Q માટે સાચો વિકલ્પ કયો છે ?

$straight n space equals space 3 comma space straight Q space equals space fraction numerator 1 over denominator left square bracket Au to the power of 3 plus end exponent right square bracket left square bracket Br to the power of minus right square bracket cubed end fraction$
$straight n space equals space 6 comma space straight Q space equals space left square bracket Au cubed right square bracket squared space left square bracket Br to the power of minus right square bracket to the power of 6$
$straight n space equals space 6 comma space straight Q space equals space fraction numerator left square bracket Au to the power of 3 plus end exponent right square bracket squared left square bracket Br to the power of minus right square bracket to the power of 6 over denominator 1 end fraction$
$bold n bold space bold equals bold space bold 3 bold comma bold space bold Q bold space bold equals bold space bold left square bracket bold Au to the power of bold 3 bold right square bracket bold space bold left square bracket bold Br to the power of bold minus bold right square bracket$

37.

$bold Co bold space bold vertical line bold space bold CO to the power of bold 2 subscript bold left parenthesis bold C subscript bold 1 bold right parenthesis end subscript bold space bold vertical line bold vertical line bold space bold Ag to the power of bold 1 subscript bold left parenthesis bold C subscript bold 2 bold right parenthesis end subscript bold space bold vertical line bold space bold Ag$ વિદ્યુત રાસાયણિક કોષ માટે આપેલ કયું નર્નસ્ટ સમીકરણ સાચું છે ?

$વિદ્યુત રાસાયણિક કોષ માટે$ $straight E to the power of 0 subscript cell space equals space straight E subscript cell space plus space fraction numerator RT over denominator 2 straight F end fraction times In space fraction numerator left square bracket Co to the power of 2 plus end exponent right square bracket over denominator left square bracket Ag to the power of plus right square bracket squared end fraction$
$straight E to the power of 0 subscript cell space equals space straight E subscript cell space plus space fraction numerator RT over denominator 2 straight F end fraction times space In space fraction numerator left square bracket Co to the power of 2 plus end exponent right square bracket over denominator left square bracket Ag to the power of plus right square bracket squared end fraction$
$straight E to the power of 0 subscript cell space equals space straight E subscript cell space minus space fraction numerator RT over denominator 2 straight F end fraction times In space fraction numerator RT over denominator 2 straight F end fraction times In space fraction numerator left square bracket Co to the power of 2 plus end exponent right square bracket over denominator left square bracket Ag to the power of plus right square bracket squared end fraction$
$straight E to the power of 0 subscript cell space minus space straight E subscript cell space equals space fraction numerator RT over denominator 2 straight F end fraction times space In space fraction numerator left square bracket Ag to the power of plus right square bracket squared over denominator left square bracket Co to the power of 2 plus end exponent right square bracket end fraction$

38. વિદ્યુત રાસાયણિક કોષમાં આપેલમાંથી કયા વિકલ્પ માટે E_cell = E⁰_cell થાય ?

બંને અર્ધકોષના દ્વાવણની સાંદ્વતા સમાન હોય ત્યારે જ
K = 1 તો જ
કોષ-પ્રક્રિયા સંતુલનમાં હોય ત્યારે
આપેલ એક પણ નહી.

39.

25 $degree$ સે તાપમાને $bold Pt bold space bold vertical line bold space bold H subscript bold 2 bold left parenthesis bold g bold. bold 1 bold. bold 0 bold space bold બ ા ર bold right parenthesis end subscript bold space bold vertical line bold space bold H subscript bold left parenthesis bold pOH bold space bold minus bold space bold 11 bold right parenthesis end subscript$ (બાર) અર્ધ-કોષનો ઑક્સિડેશન પોટૅન્શિયલ જણાવો.

0.177 V
0.0282 V
0.616 V
0.649 V

40. વિદ્યુત રાસાયણિક કોષનો પોટૅન્શિયલ કારે શૂન્ય થાય ?

ઍનોડનો E_OXઅને કૅથોડનો E_red સમાન થાય ત્યારે
ઍનોડન્નો E⁰_redઅને કૅથોડનો E⁰_red સમાન હોય ત્યારે જ
ઍનોડનો E_OXઅને કૅથોડનો E_OX સમાન હોય ત્યારે જ
બંને અર્ધકોષના દ્વાવણની સાંદ્વતા સમાન થાય ત્યારે જ

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Gujarati JEE Chemistry : રેડોક્ષ પ્રક્રિયા અને વિદ્યુતરસાયણ

Multiple Choice Questions

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