Question

pls.help with this give reasons

Answer 1

Answer:

hii mate here is your answer

Explanation:

(a) Beating rocks is a physical change because no new substance is form with new characteristics

(b) preparing panner from milk is a chemical change because panner has different characteristics. And panner can not be converted into milk again.

(c) sublimation of NH4Cl is a physical change because after cooling it again come into its original form with same characteristics.

(d) melting sulphur is a physical change because it come again into its original form after cooling but burning sulphur is a chemical change because on burning its form sulphur dioxide which cannot change again into sulphur

(e) cutting of vegetables is physical change because it do not have different characteristics but when it cook it become chemical change because a new substance is form which have different characteristic.

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