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Railways PYQCBT 1 2016

RRB NTPC · Question 100

The most important component of glass is ______. A. Mica B. Quartz C. Silica D. Sodium Borate

  1. D

  2. B

  3. C

  4. A

Show answer & explanation

Answer: (C) C

Explanation

Silica (silicon dioxide, sand) is the main constituent of glass, about 70%, along with soda and lime.