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Briefly answer the following questions:
1. You are given two samples of water labelled as ‘A’ and ‘B’. Sample ‘A’ boils at 100°C and sample ‘B’ boils at 102°C. Which sample of water will not freeze at 0°C? Comment.
Sample ‘B’ will not freeze at 0°C because it is not . At 1 atm, the boiling point of pure water is , and the freezing point of pure water is 0°C.
2. What are the favourable qualities given to gold when it is alloyed with copper or silver for the purpose of making ornaments?
Pure gold () is very soft. It is alloyed with silver or copper to impart strength while producing ornaments. An alloy with 20 parts of gold and 4 parts of silver is called a .
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