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Physics: Chapter 2 Solutions
Last 15 years questions with solutions
Topic: Strength of Solution
Q.1Discuss the effect of Temperature on Solubility of solids in Solvent.
AnsThe solubility of solid in a liquid solvent generally increases with increase in temperature of the solvent.
Very rarely some neutral salts like KCl for some solids the solubility decreases with increase in temperature.
temperature increases, the solubility of a gas decrease as shown by the downward trend in the graph .More gas is present in a solution with a lower temperature compared to a solution with a higher temperature. The reason for this gas solubility relationship with temperature is that increased temperature causes an increase in kinetic energy. The higher kinetic energy causes more motion in molecules which break intermolecular bonds and escape from solution.
Q.5What is Henry’s law explain with an example.
AnsHenry’s law states mole fraction χ of the gas
Q.2What is interstitial solid solutions.
AnsIn certain alloys the atoms of smaller size occupy the voids or interstices between atoms of solid. such are called interstitial solids example of such solid are
Tungsten carbide.
dissolved in a given solvent at a given temperature Is directly proportional to the pressure of the gas. χ α p gas
Q.3What is substitutional solid solutions.
AnsIn certain alloys atoms, molecules, or ions belonging to one solid substance replace similar species belonging to other solid. In its crystal lattice.
Example includes Brass and coinage silver.
Q.4Thermal pollution is merely