One day resets went to ajeweller s shop with her mother. her mother gave an old gold jewellery to gold smith to polish. next day when they brought the jewellery back they found that there is slight loss in weight. can you suggest reason for loss in weight.

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.