Questions in solutions

Select	Question
	Dissolution of a solute is an exothermic process when
	The statement, “If $0.003$ moles of a gas are dissolved in $900g$ of water under a pressure of $1$ atmosphere, $0.006$ moles will be dissolved under a pressure of 2 atmosphere”, illustrates
	Which of the following is not correct for ${D_2}O$
	Solubility curve of in water with temperature is given as
	The solubility of $NaCl$ is least affected by increase in temperature because,
	A super saturated solution is a metastable solution whose solute concentration
	From the diagram given below, which compound would be most appropriate to be easily purified by recrystallization from water
	Sodium sulphate dissolves in water with evolution of heat. Consider a saturated solution of sodium sulphate. If the temperature is raised, then according to the Le Chatelier’s principle
	Which one of the following plots correctly represents the variation in density of water with temperature
	Molarity of $4%\, NaOH$ solution is