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Solutions — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistrySolutions1 Mark
MCQ
The unit of ebulioscopic constant is ___________.
  • A
    K kg mol-1 or K(molality)-1
  • B
    mol kg K-1 or K-1(molality)
  • C
    kg mol-1 K-1 or K-1(molality)-1
  • D
    K mol kg-1 or K(molality)
✓

Answer

  1. K kg mol-1 or K(molality)-1

Explanation: 

$\text{K}_{\text{b}}=\frac{\Delta\text{T}_{\text{b}}}{\text{m}}=\frac{\text{K}}{\text{mol kg}^{-1}}\text{or K}\text{(molality)}^{-1}$

The unit of ebullioscopic constant is K kg mol-1 or K molality-1

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