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JEE Main 202131 AugustEvening Shift
Exam
JEE Main
Year
2021
Date
31 August
Shift
Evening Shift
Subject
Chemistry
Chapter
Electrochemistry

JEE Main 2021 · 31 August · Evening Shift · Chemistry · Electrochemistry

Match List - I with List - II : List - I (Parameter) List - II...

Match List - I with List - II :

List - I
(Parameter)		 List - II (Unit)
(a) Cell constant (i) Scm2mol−1S{cm}^{2}{mol}^{- 1}
(b) Molar conductivity (ii) Dimensionless
(c) Conductivity (iii) m−1{m}^{- 1}
(d) Degree of dissociation of electrolyte (iv) Ω−1m−1{Ω}^{- 1}{m}^{- 1}

Options

  1. A(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
  2. B(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
  3. C(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
  4. D(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

Correct answer

A. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

Step-by-step solution

Cell constant =ℓA=m−1= \dfrac{ℓ}{A} = {m}^{- 1}

Conductivity k=1ρ=ℓRA=Ω−1m−1k = \dfrac{1}{ρ} = \dfrac{ℓ}{RA} = {Ω}^{- 1}{m}^{- 1}

Molar Conductivity =λm=k×1000Molarity=Scm2mol−1= {\lambda}_{m} = \dfrac{k \times 1000}{\text{Molarity}} = S{cm}^{2}{mol}^{- 1}

Degree of dissociation = Number of mole dissociated out of one mole, hence, it is dimensionless.

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