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Q: Grades of silica used in HPTLC has the particle size as _______ and ______. (d)
  • A. Large and uniform
  • B. Small and uniform
  • C. Large and irregular
  • D. Small and irregular
Correct Answer: Option B - Grades of silica used in HPTLC has the particle size as small and uniform. Silica gel is the preferred support of HPTLC stationary phases due to its beneficial chemical, mechanical and chromatographic properties.
B. Grades of silica used in HPTLC has the particle size as small and uniform. Silica gel is the preferred support of HPTLC stationary phases due to its beneficial chemical, mechanical and chromatographic properties.

Explanations:

Grades of silica used in HPTLC has the particle size as small and uniform. Silica gel is the preferred support of HPTLC stationary phases due to its beneficial chemical, mechanical and chromatographic properties.