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Permanent Change

All irreversi...

Question

All irreversible changes are chemical changes. True or false?

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Solution

Yes, all irreversible changes are chemical changes because in chemical change new substances formed during a chemical reaction are not easily be get back to the original substances.

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Similar questions

Q. Statement: A physical change is irreversible whereas a chemical change is reversible.

State whether the given statement is true or false.

Chemical changes are mostly irreversible.

Consider the following statements:

(i) Chemical changes are irreversible.

(ii) Chemical changes produce new substances.

(iii) Chemical changes does not involve large energy changes.

Which among these are incorrect?

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. Changes, in which new substances with different properties are formed, are called

(a) physical changes
(b) chemical changes
(c) irreversible changes
(d) reversible changes

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