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Railways PYQCBT 2 2017

RRB NTPC · Question 20

The second most abundant element on Earth's crust is:

  1. Oxygen

  2. Carbon

  3. Silicon

  4. Hydrogen

Show answer & explanation

Answer: (C) Silicon

Explanation

By mass, the Earth's crust is about 46% oxygen and 28% silicon, so silicon is the second most abundant element.