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When water bo...

Question

When water boils, its molecules start moving faster and many of them escape from water. Is boiling a chemical or a physical change?

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Solution

Boiling of water is a physical change because in boiling only the form of water is changed.
It changes from liquid to gaseous state.

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Similar questions

Q. Question 1 (d)
Classify the following as chemical or physical changes:
d. Boiling of water to form steam

Classify the following as a physical or a chemical change :

(a) Drying of wet clothes

(b) Manufacture of salt from seawater.

(c) Butter getting rancid

(d) Boiling of water

(e) Burning of paper

(f) Melting of wax

(g) Burning of coal

Q. State whether the following statements are true or false. Rewrite the false ones correctly.
(a) All irreversible changes are chemical changes.
(b) A liquid can sublime.
(c) The evaporation of water take place only at 100°C. when it is boiling.
(d) The melting of ice is a physical change.
(e) The souring of milk is a periodic change.
(f) The flowering of trees is a periodic change.
(g) Solidification and condensation are the same.
(h) The breaking of glass tumbler is a chemical change because it is irreversible.
(i) Boiling, evaporation and condensation are physical changes.

Q. Why is there no change in temperature when water starts boiling?

Q. Is removing of water from compounds like CuSO₄·10H₂O a physical or chemical change?

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