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STD 12 - 2. Electrochemistry — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 2. Electrochemistry4 Marks
MCQ
Match List$-I$ with List$-II$:

List$-I$

(Parameter)

List$-II$

(Unit)
$(a)$ Cell constant $(i)$ $\mathrm{S}\, \mathrm{cm}^{2} \,\mathrm{~mol}^{-1}$
$(b)$ Molar conductivity $(ii)$ Dimensionless
$(c)$ Conductivity $(iii)$ $\mathrm{m}^{-1}$
$(d)$ Degree of dissociation of electrolyte $(iv)$ $\Omega^{-1} \,\mathrm{~m}^{-1}$

Choose the most appropriate answer from the options given below :

  • ✓
    $(\mathrm{a})-(\mathrm{iii}),(\mathrm{b})-(\mathrm{i}),(\mathrm{c})-(\mathrm{iv}),(\mathrm{d})-(\mathrm{ii})$
  • B
    $(\mathrm{a})-(\mathrm{iii}),(\mathrm{b})-(\mathrm{i}),(\mathrm{c})-(\mathrm{ii}),(\mathrm{d})-(\mathrm{iv})$
  • C
    $(a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)$
  • D
    $(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)$
✓

Answer

Correct option: A.
$(\mathrm{a})-(\mathrm{iii}),(\mathrm{b})-(\mathrm{i}),(\mathrm{c})-(\mathrm{iv}),(\mathrm{d})-(\mathrm{ii})$
a
Cell constant $=\left(\frac{\ell}{\mathrm{A}}\right) \Rightarrow$ Units $=\mathrm{m}^{-1}$

Molar conductivity $\left(\Lambda_{m}\right) \Rightarrow$ Units $=\mathrm{Sm}^{2} \,\mathrm{~mole}^{-1}$

Conductivity $(\mathrm{K}) \Rightarrow$ Units $=\mathrm{S}\, \mathrm{m}^{-1}$

Degree of dissociation $(\alpha) \rightarrow$ Dimensionless

$\therefore$ $(a) - (iii)$

$\quad(b) - (i)$

$\quad(c) - (iv)$

$\quad(d) - (ii)$

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