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Heterogenous Mixture

Surface tensi...

Question

Surface tension of water is $T_{1}$ . When oil spreads on water surface tension becomes $T_{2}$ ,then:

T_{1} > T_{2}

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T_{1} = T_{2}

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T_{1} < T_{2}

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T_{1} = \frac{T_{2}}{2}

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Solution

The correct option is C $T_{1} > T_{2}$
A highly soluble substance like sodium chloride ordinarily increases the surface tension. But sparingly soluble substances reduce the surface tension. Oil being sparingly soluble reduces the surface tension. i.e.
$T_{2} < T_{1}$ or
$T_{1} > T_{2}$

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