29. Litmus paper Guard tube Boiling tube 15 14.854 Conc. H2SO4 Sodium chloride In the activity shown in the diagram, if the climate is humid, the role of calcium chloride taken in the guard tube is to : (a) Absorb the evolved gas (b) Warm up the gas (c) Dry the gas (d) Absorb chloride ions from the evolved gas AN 85441 20 Which one of the following chemicals is used in soda acid fire extinguishers?
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Answer:
the answer is c)
Explanation:
since the day is humid , we need something to
absorb the mositure
Answered by
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Answer:
Explanation:
HCl gas is produced.
2NaCl + H2SO4 → Na2SO4 + 2HCl
The gas when passed through dry litmus paper will show no change in colour because it cannot show acidic properties as H+ is not present.
The gas when passed through moist litmus paper will show colour change to red.
It shows acidic properties because H+ ions are produced when HCl dissolves in water.
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