Which type of gels form due to hydrogen bonding between the solute and solvent molecules?
Lyophilic gels
Lyophobic gels
Thermo-reversible gels
Chemically cross-linked gels
Lyophilic gels form when there is a strong affinity (hydrogen bonding, dipole-dipole interactions) between the solute and solvent molecules.
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5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.820C. If Na2SO4 is 81.5% ionised, the value of x (K

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