Class ix science Ch 1 Change of states of matter (part-4)

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Changes of state are physical changes in matter. They are reversible changes that do not involve changes in matter’s chemical makeup or chemical properties. Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization.

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Police DAV Public School, Ludhiana affiliated to CBSE (New Delhi) is a joint venture of Punjab Police and DAV College Managing Committee, New Delhi. It is co-educational English Medium Institution which aspires to meet the expectations of value based quality education for the wards of police personnel and civilians. Established in April 2011, the school is consistently flourishing under the parentage and able guidance of the visionaries Sh. M.K.Tiwari IPS, the Chairman and Dr. Rashmi Vij, the Manager.

Class ix science Ch 1 Change of states of matter (part-4)

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