Question

plzzz answer the questions its urgent..

Answer 1

1. we observe that lime water turns milky .
2. the reason behind the change is release of CO2 from mouth .
3. CO2 +CaO ( lime water ) => CaCO3
4. CO2 is used by plants for photosynthesis
5. Na2 CO3 + H2 SO4 => Na2SO4+ H2O + CO2

HOPE IT ' LL BE HELPFUL ..........
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