Increasing the temperature of an aqueous solution will cause

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Increasing the temperature of an aqueous solution causes (a) decrease in molality (b) decrease in molarity (c) decrease in mole fraction (d) increase in molarity

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Answer ⇒ (b). Decrease in molarity. 

Explanation ⇒ 
If the temperature of the substances will be increased then the volume of the substances will increase.
Now,
Molarity of the substances inversely proportional to the Volume. 
∴ If the volume will increase then the molarity will decrease.

Molarity = No. of moles of the solute/Volume of the Solutions.  


Hence, Option (b). is correct. 


Hope it helps.

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