Which of the following is not a physical change?
A. Boiling of water to give water in vapor form.
B. Melting of ice to give water(Liquid)
C. Dissolution of salt(NaCl) in water.
D. Combustion of Liquefied Petroleum Gas.
Answer:D
Which of the following is not a physical change?
A. Boiling of water to give water in vapor form. B. Melting of ice to give water(Liquid) C. Dissolution of salt(NaCl) in water. D. Combustion of Liquefied Petroleum Gas.
Explanation: As you know, Chemical reaction is an Irreversible Reaction. In point (a.) the vapor can convert back to the water. (b). In this case, Water can again be converted into Ice. (c). In this case, By the process of Evaporation, we will get the NaCl back in its Crystal form.