Atharva prepared lime water and next month use it for the experiment showing carbon dioxide is evolved in the process of respiration .
1. white precipitate is formed
2. white precipitate is not formed
3. lime water must be fresh
4.lime water can be used anytime
a. 2 is correct
b. 2 and 3 are correct
c. 1 and 4 are correct
d. 1 and 4 are correct
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lime water must be fresh
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