Question

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​

Answer 1

Answer:

the newer is ca to increase the flow of gas

Answer 2

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.