Question

Dissolving sugar in water is a chemical change. True or False?
A. True
B. False

Answer 1

Hint: We should be knowing the basic difference between the physical change and chemical change so as to answer this question. Even we should be familiar with the reaction when sugar is dissolved in water.

Complete step-by-step answer:
Physical changes and changes affecting the form of a chemical substance but not a chemical composition. Physical changes are used to separate mixtures into their component compounds but cannot usually be used to separate compounds into chemical elements or similar compounds.
Chemical changes occur when a substance combines with another way to form a new substance called chemical synthesis or alternatively chemical decomposition into two or more different substances. These processes are called chemical reactions and in general are not reversible except by for the chemical reactions.
Dissolving sugar in water is a physical change because sugar molecules are dispersed within the water but the individual sugar molecules are unchanged.

Therefore we can see that dissolving sugar in water is a physical change and the answer to this question is false. So Option B is a correct option.

Note: We should know that in a physical change the molecules are rearranged while their actual composition remains the same. In a chemical change the molecular composition of a substance completely changes and a new system is formed.
Some examples of physical changes: freezing of water, melting of wax, boiling of water etc.
Melting and burning of candle wax is an example of both physical and chemical change. Burning of wood is an example of both physical and chemical change.