Which substances can be used to detect the presence of water? 1 anhydrous cobalt(II) chloride 2 anhydrous copper(II) sulfate 3 litmus 4 methyl orange
A.
B.
C.
D.
Exam No：0620_s25_qp_11 Year：2025 Question No：31
Answer:
A
Knowledge points:
1.1.1. State the distinguishing properties of solids, liquids and gases
Solution:
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