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1. Solution and colligative properties — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry1. Solution and colligative properties1 Mark
MCQ
A binary liquid solution is prepared by mixing $n-$ heptaneand ethanol. Which one of the following statements is correct regarding the behaviour of the solution ?
  • A
    The solution is non-ideal, showing $-ve$ deviation from Raoult's Law.
  • ✓
    The solution is non-ideal, showing $+ve$ deviation from Raoult's Law.
  • C
    $n-$ heptane shows $+ve$ deviation while ethanol shows $-ve$ deviation from Raoult's Law.
  • D
    The solution formed is an ideal solution .
✓

Answer

Correct option: B.
The solution is non-ideal, showing $+ve$ deviation from Raoult's Law.
b
For this solutis intermon intermon intermon intermolecular interactions between $n$ heptane and ettanolare weaker than $n$ -heptane $-n-$, heptane & ethanol. Ethanol interactions hence the solution of $n$ -heptane and ettanolis non-ideal and shows positive deviation from Raoult’s

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