In these columns, indicate whether the given changes are periodic or non-periodic; reversible or irreversible; a physical or chemical. Use the letters given below for your answer.

Change: P or NP R or IR P or C

(a) sharpening a pencil
(b) breaking a cricket bat
(c) the burning of gas in a stove
(d) dissolving salt in water
(e) the burning of a matchstick
(f) the stitching of cloth into a shirt
(g) heating butter strongly to make ghee
(h) cutting cucumber for salad

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Solution

(a) P, NP and IR
(b) P, NP and IR
(c) C, NP and IR
(d) P, NP and R
(e) C, NP and IR
(f) P, NP and IR
(g) P, NP and R
(h) P, NP and IR

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