Question

What kind of changes take place in the following? i) sugar dissolved in water ii) strong heating of sugar a) i) and ii) - Physical change b) i) and ii) - Chemical change c) i) - Physical change, ii) - Chemical change d) i) - Chemical change, ii) - Physical change​

Answer 1

Answer:

Sugar dissolving in water is a physical change. It is because no new substance is formed. Also, the process is reversible - water and sugar can be separated by vaporization followed by condensation and crystallization.

When sugar is continuously heated at very high temperature, a black powdery substance is obtained. This substance is charred sugar. This process is a chemical change.

option C is correct i) - Physical change, ii) -

Chemical change

Answer 2

The kind of changes take place are i) - Physical change, ii) - Chemical change.

The kind of changes take place are i) - Physical change, ii) - Chemical change. So, the correct option is c.

• When sugar is dissolved in water we get a sweet water. If we boil the sugar water then we will get the sugar back in form of precipitate. So, this change is physical where the form of components remain same.
• Strong heating of sugar gives a chemical change because here the sugar converted to black carbon.