Question 8
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a: (a) physical change that can be reversed (b) chemical change that can be reversed (c) physical change that cannot be reversed (d) chemical change that cannot be reversed
Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar? In which case would it be possible to dissolve more sugar? Does water dissolve an equal amount of salt and sugar? What can be done to dissolve more salt in a saturated solution of water and salt? Name two other things that dissolve in water. [5 MARKS]