Analyse the above diagrams and answer the following questions. (a) Ide – InterviewSolution

1.	Analyse the above diagrams and answer the following questions. (a) Identify the test tube (s) in which new substance (s) is`//`are formed. (b) Does the composition change in all the test tubes ? Give reasons . (C ) Identify the colour changes associated with the relevant physical change given.
Answer» (a) heating of mercuric oxide is a chemical change. Hence in test tube -C new substance is formed (b) Heating of wax and zinc oxide are physical changes Hence in test -A test tube-B the molecular composition remains the same (C ) In test tube-B change in colour is observed. Zinc oxide is white in colour and turns to yellow on heating

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