यदि शुद्ध विलायक का हिमांक \(0^{\circ}C\) है और विलयन का हिमांक \(-0.72^{\circ}C\) है, तो \(\Delta T_f\) कितना होगा?
If freezing point of pure solvent is \(0^{\circ}C\) and freezing point of solution is \(-0.72^{\circ}C\), what is \(\Delta T_f\)?
Correct answer and explanation
C. \(0.72^{\circ}C\)
Concept
हिमांक में कमी शुद्ध विलायक और विलयन के हिमांक का अंतर है। / Freezing point depression is the difference between freezing points of pure solvent and solution.
Why this answer is correct
\(0 - (-0.72)=0.72\)। / \(0 - (-0.72)=0.72\).
Exam Tip
\(\Delta T_f\) को कमी के धनात्मक मान के रूप में लिखें। / Write \(\Delta T_f\) as a positive magnitude.
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