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Class 12 · Chemistry
→According to Henry's law, at the same temperature, if the partial pressure of a gas becomes 4 times, what happens to the mole fraction of dissolved gas?
Class 12 · Chemistry
→In a difficult solubility problem, which information is most useful to identify first?
Class 12 · Chemistry
→Which is the most scientific precaution when stating solubility?
Class 12 · Chemistry
→Pressure is increased to raise gas solubility, but temperature is also increased greatly. What is the correct analysis?
Class 12 · Chemistry
→The solubility of a solid decreases as temperature increases. What is not necessary when its hot saturated solution is cooled?
Class 12 · Chemistry
→If solubility at a temperature is 40 g per 100 g water and 45 g remains dissolved, what state can this indicate?
Class 12 · Chemistry
→If solubility at a temperature is 40 g per 100 g water and 30 g is dissolved, what type of solution is it?
Class 12 · Chemistry
→In which condition would aquatic organisms face the greatest risk of oxygen deficiency?
Class 12 · Chemistry
→A gas dissolves less in hot water and more in cold water. Which general behaviour does this confirm?
Class 12 · Chemistry
→Why is partial pressure more important than total pressure for the solubility of a particular gas in a mixture?
Class 12 · Chemistry
→At constant temperature, how can the amount of gas dissolved in a liquid be doubled according to Henry’s law?
Class 12 · Chemistry
→Which statement correctly distinguishes solubility from rate of dissolving?
Class 12 · Chemistry
→Why does the fizz of a cold drink decrease when its bottle is left open for a long time?
Class 12 · Chemistry
→What is the most direct way to make an unsaturated solution saturated if temperature is kept constant?
Class 12 · Chemistry
→If some solute remains at the bottom of a saturated solution, which statement about the clear solution above is correct?
Class 12 · Chemistry
→A substance does not dissolve in water but dissolves in another solvent. What conclusion follows?
Class 12 · Chemistry
→Dissolution of a solid releases heat. Which statement about its solubility on heating is possible?
Class 12 · Chemistry
→Dissolution of a solid absorbs heat. What is likely to happen to its solubility when temperature increases?
Class 12 · Chemistry
→Dissolution of a gas in a liquid is generally exothermic. What explains the decrease in solubility on heating?
Class 12 · Chemistry
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