Question

Distinguish between the following
1. physical change &Chemical change
2.Periodic change & Non-periodic change ​

Answer 1

Answer:

Distinguish between the following

1. physical change &Chemical change

2.Periodic change & Non-periodic change

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Answer 2

Answer:

1.

Physical change Chemical change

(a) This change is temporary and reversible. (a) These changes are permanent and irreversible.

(b) There is no formation of new products. (b) There is formation of new products.

(c) There is no energy change in these changes. (c) Energy is either absorbed or evolved in these changes.

Example - Melting of ice. Example - Change of milk into curd.

2.

Periodic Change Non-periodic change

(a)Changes that take place at regular intervals of time are periodic changes. (a)Changes which take place irregularly and do not repeat are non-periodic changes.

(b)Example - - Change of seasons - Movement of clock hands - Day turning into night (b) Example - - Rusting of iron - Change in weather - Thunder and lightning

Explanation:

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