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15. Malleability means the process of beating into sheets.
16. Chemical change means the change which can be done by chemical methods with chemicals and physical change means the change which is done physically by one person.
20. yes it is a physical change because it is done by one person.
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Q: 15 malleability describe the property of a metal 's ability to be distorted below compression . it is a physical property of metal by which they can be hammered . shaped and rolled into a very thin sheet whithout rupturing.
21: ammonnium chloride is solid on heating it sublime
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