Guard tubes usually contain
1.H2O to increase the flow of gas
2.CaCO3 to absorb the excess moisture
3.CaCl2 to dry the gas
4.Ca to increase the flow of gas
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Answer:
the newer is ca to increase the flow of gas
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3. CaCl₂ to dry the gas
Explanation:
- The guard tube contains anhydrous calcium chloride.
- During Humid temperature, the gas produced usually has some vapour diffused within it .
- When the gas is passed through the guard tube, the calcium chloride absorbs water molecules.
- It reduces the moisture content of the gas.
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