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Class 12 Mcq

Class 12 Chemistry के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ChemistryThe solubility of a solid is 30 g per 100 g water. How much solute is needed to make a saturated solution in 250 g water?Class 12Chapter 01: Solutions3: SolubilityLevel 13Medium ChemistryWhich statement correctly explains a supersaturated solution?Class 12Chapter 01: Solutions3: SolubilityLevel 12Easy ChemistryA solution contains 55 g solute in 100 g water while normal solubility is 45 g. What may happen when a small crystal is added?Class 12Chapter 01: Solutions3: SolubilityLevel 16Hard ChemistryThe solubility of a solid decreases as temperature increases. This is more consistent with which type of dissolution?Class 12Chapter 01: Solutions3: SolubilityLevel 15Medium ChemistryWhy can it be dangerous for divers to come up suddenly from deep water?Class 12Chapter 01: Solutions3: SolubilityLevel 14Medium ChemistryIn a difficult solubility problem, which information is most useful to identify first?Class 12Chapter 01: Solutions3: SolubilityLevel 14Medium ChemistryWhich is the most scientific precaution when stating solubility?Class 12Chapter 01: Solutions3: SolubilityLevel 12Easy ChemistryPressure is increased to raise gas solubility, but temperature is also increased greatly. What is the correct analysis?Class 12Chapter 01: Solutions3: SolubilityLevel 15Medium ChemistryThe solubility of a solid decreases as temperature increases. What is not necessary when its hot saturated solution is cooled?Class 12Chapter 01: Solutions3: SolubilityLevel 15Medium ChemistryIf solubility at a temperature is 40 g per 100 g water and 45 g remains dissolved, what state can this indicate?Class 12Chapter 01: Solutions3: SolubilityLevel 11Easy ChemistryIf solubility at a temperature is 40 g per 100 g water and 30 g is dissolved, what type of solution is it?Class 12Chapter 01: Solutions3: SolubilityLevel 10Easy ChemistryIn which condition would aquatic organisms face the greatest risk of oxygen deficiency?Class 12Chapter 01: Solutions3: SolubilityLevel 13Medium ChemistryA gas dissolves less in hot water and more in cold water. Which general behaviour does this confirm?Class 12Chapter 01: Solutions3: SolubilityLevel 11Easy ChemistryWhy is partial pressure more important than total pressure for the solubility of a particular gas in a mixture?Class 12Chapter 01: Solutions3: SolubilityLevel 13Medium ChemistryAt constant temperature, how can the amount of gas dissolved in a liquid be doubled according to Henry’s law?Class 12Chapter 01: Solutions3: SolubilityLevel 13Medium ChemistryWhich statement correctly distinguishes solubility from rate of dissolving?Class 12Chapter 01: Solutions3: SolubilityLevel 11Easy ChemistryWhy does the fizz of a cold drink decrease when its bottle is left open for a long time?Class 12Chapter 01: Solutions3: SolubilityLevel 12Easy ChemistryWhat is the most direct way to make an unsaturated solution saturated if temperature is kept constant?Class 12Chapter 01: Solutions3: SolubilityLevel 10Easy ChemistryIf some solute remains at the bottom of a saturated solution, which statement about the clear solution above is correct?Class 12Chapter 01: Solutions3: SolubilityLevel 11Easy ChemistryA substance does not dissolve in water but dissolves in another solvent. What conclusion follows?Class 12Chapter 01: Solutions3: SolubilityLevel 11Easy