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Question

Silicon is an important constituent of:
  1. chlorophyll
  2. haemoglobin
  3. amalgams
  4. rocks

A
haemoglobin
B
amalgams
C
chlorophyll
D
rocks
Solution
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Chlorophyll has magnesium as an important metal, haemoglobin has iron as its important constituent, amalgams are mixtures of something with mercury. Note that, silicon is the most abundant element in earth's crust.

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