The use of CaCl2 and PCl5 in the process of crystallization is as a____________________?
Correct answer: C. drying agent
- A. oxidizing agent
- B. reducing agent
- C. drying agent
- D. colouring agent
Explanation
Calcium chloride and phosphorus pentachloride remove water because they act as drying agents, helping to obtain a dry product or solvent during purification. Students may choose oxidizing agent because PCl5 is reactive, but its role in this context is removal of moisture, not oxidation.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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