Von Answe 2076 Set B Q. No. 23 Are all standard solutions, primary
standard solutions or not? Give reason. 1 g of a divalent metal
was dissolved in 25 mL of 2N H2SO4 (f = 1.01). The excess
acid required 15.1mL of 1N NaOH (f = 0.8) for complete
neutralization. Find the atomic weight of the metal
. [1 +4]
Ans: Atomic weight = 52.05 amu
go5 gram of a divalent metal

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

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