Chemistry PYQ 138 of 152 · Everyday Chemistry

Match the following:

A. Vitamin B121. Magnesium
B. Haemoglobin2. Cobalt
C. Chlorophyll3. Copper
D. Brass4. Iron
  1. AA-2, B-4, C-1, D-3
  2. BA-2, B-1, C-3, D-4
  3. CA-4, B-1, C-2, D-3
  4. DA-3, B-4, C-2, D-1

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Correct answer: (a) A-2, B-4, C-1, D-3

Explanation

Vitamin B12 (cyanocobalamin) contains the metal Cobalt at its core, so A-2.

Haemoglobin uses Iron (Fe) to bind oxygen, and Chlorophyll has Magnesium (Mg) at its centre, giving B-4, C-1.

Brass is an alloy of Copper and zinc, so D-3.

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