The addition of soap changes the surface tension of water to T1 and that of salt solution changes to T2. Then

Question

The addition of soap changes the surface tension of water to T1 and that of salt solution changes to T2. Then (A) T1=T2 (B) T1>T2 (C) T1 < T2 (D) T1≥ T2

Tardigrade Admin · Accepted Answer

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

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

$T_{1} = T_{2}$

$T_{1} > T_{2}$

$T_{1} < T_{2}$

$T_{1} \geq T_{2}$

Q. The addition of soap changes the surface tension of water to T1​ and that of salt solution changes to T2​. Then

T1​=T2​

T1​>T2​

T1​<T2​

T1​≥T2​

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

$T_{1} = T_{2}$

$T_{1} > T_{2}$

$T_{1} < T_{2}$

$T_{1} \geq T_{2}$