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STD 11 - 1. Some basic concept of chemistry — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 1. Some basic concept of chemistry4 Marks
MCQ
Which of the following carbon contains only one element
  • A
    Marble
  • ✓
    Diamond
  • C
    Glass
  • D
    Sand
✓

Answer

Correct option: B.
Diamond
b
Diamond is an allotrope of carbon and is therefore, made up of one element, carbon. Glass, on the other hand, is mainly composed of silica and sodium carbonate. Marble is mainly calcium carbonate and sand is composed of silicon dioxide.

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