CTET 2 Math and Science 7 Jan 2022 Paper

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Question : 90 of 150

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Which one of the following is the BEST example of an 'authentic task' to assess students' understanding related to chemical changes?

Design a chamber which prevents rusting of iron nails.
Create a filtration mechanism to reduce salinity levels in sea water.
Observe the changes on an iron nail when placed in a copper sulphate solution.
Create a cooling chamber that can maintain low temperatures for chemical changes.

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