Multiple choice

Which of the following is used in a desiccators in Laboratory?

  1. Na2CO3

  2. NaCl

  3. Na2SO4

  4. CaCl2

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CaCl2 is an excellent desiccant due to its high hygroscopicity - it readily absorbs water vapor from the air to form hydrated species. Na2CO3 can absorb some water but is less effective, NaCl is not hygroscopic enough, and Na2SO4 is used as a drying agent only after initial drying, not as a primary desiccator.