33 Mrs Usha a science teacher performed the following

Last updated: 7/3/2023

33 Mrs Usha a science teacher performed the following experiments Experiment 1 She heated sugar in a China dish A black substance was obtained along with caramel fumes Experiment 2 She mixed sand and crushed naphthalene balls in a China dish Then she covered the China dish with a watch glass with some ice kept on it and heated Crystals of pure naphthalene were seen on the underside of the watch glass A B Identify the changes taking place in these experiments Experiment 1 Chemical change Crystallisation Experiment 2 Physical change Decomposition Experiment 1 Physical change Crystallisation Experiment 2 Chemical change Sublimation Experiment 1 Physical change Crystallisation Experiment 2 Physical change Crystallisation Experiment 1 Chemical change Decomposition C D Experiment 2 Physical change Sublimation and