You visited us 1 times! Enjoying our articles? Unlock Full Access!

Surface Tension

The addition ...

Question

The addition of soap changes the surface tension of water to $T_{1}$ and that of salt solution changes to $T_{2}$ . Then:

T_{1} = T_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

T_{1} > T_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

T_{1} < T_{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

T_{1} \geq T_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $T_{1} < T_{2}$
Soap decreases the surface tension of water by weakening the hydrogen bonds. But salt, when dissolved in water, adds an ionic component to the surface structure. So when one examines pure water, the surface is a mesh where the hydrogens of each molecule are weakly attracted (hydrogen bonding) to the oxygens of the neighbouring molecules; when you add NaCl to the water, it dissociates, and you get "rings" of water molecules around each ion, thereby increasing Surface Tension. Thus we get $T_{2} > T_{1}$

Suggest Corrections

Similar questions

A body of weight 100 N is suspended with the help of strings as shown in figure. The tensions T₁ and T₂ will be

I, I I, I I I

T_{1}, T_{2}

T_{3}

T_{1}, T_{2}

T_{3}

75^{\circ} C

70^{\circ} C

t_{1}

70^{\circ} C

65^{\circ} C

t_{2}

65^{\circ} C

60^{\circ} C

t_{3}

T_{1}

T_{2}

\frac{1}{6}

T_{2}

\frac{1}{3}

T_{1}

T_{2}

Join BYJU'S Learning Program