S cm-1 is equal to

The correct answer is Option (2) → 100 S m^-1.

To change the unit of conductivity from S cm⁻¹ to S m⁻¹, convert centimetres into metres. Since the length appears in the denominator, the number becomes larger:

    \( \displaystyle 1\ \mathrm{cm}=10^{-2}\ \mathrm{m} \)

    \( \displaystyle 1\ \mathrm{S\,cm^{-1}}=\frac{1\ \mathrm{S}}{10^{-2}\ \mathrm{m}} \)

    \( \displaystyle 1\ \mathrm{S\,cm^{-1}}=10^{2}\ \mathrm{S\,m^{-1}}=100\ \mathrm{S\,m^{-1}} \)

So 1 S cm⁻¹ is equal to 100 S m⁻¹.

Shortcut: One metre holds 100 centimetres, so a conductor that gives 1 S per centimetre gives 100 S per metre.

NCERT (2026-27 edition):
Conductance of Electrolytic Solutions – …