Q: 109 (IAS/1999)
question_subject:
Science
question_exam:
IAS
stats:
0,50,37,11,15,11,50
keywords:
{'substances': [0, 0, 1, 1], 'elements': [0, 0, 2, 5]}
The correct matching is:
I. Diamond - (D) Carbon
Diamond is a naturally occurring form of carbon, consisting of carbon atoms arranged in a crystal lattice structure.
II. Marble - (A) Calcium
Marble is a metamorphic rock primarily composed of calcium carbonate.
III. Sand - (B) Silicon
Sand is primarily composed of silicon dioxide (SiO2), which is the chemical compound of silicon and oxygen.
IV. Ruby - (C) Aluminium
Ruby is a gemstone consisting of aluminum oxide (Al2O3) with traces of chromium, which gives it its red color.
Therefore, the correct matching is:
I. Diamond - (D) Carbon
II. Marble - (A) Calcium
III. Sand - (B) Silicon
IV. Ruby - (C) Aluminium