Question : The mineral constituent of chlorophyll is
Option 1: Iron
Option 2: Magnesium
Option 3: Calcium
Option 4: Potassium
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Correct Answer: Magnesium
Solution : The correct option is Magnesium.
The chlorophyll pigment is present in cell organelles known as chloroplasts. These chloroplasts serve as a site for photosynthesis. Chlorophyll is a porphyrin derivative. It has a magnesium atom in the centre, and four nitrogen atoms surround it. A pyrrole ring structure with four carbons and nitrogen exists in the chlorophyll.
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Question : Which of the following is an example of micronutrient supplied by soil?
Option 1: Potassium
Option 2: Iron
Option 4: Sulphur
Question : Limestone, chalk and marble are different forms of ____________.
Option 1: calcium carbonate
Option 2: sodium carbonate
Option 3: potassium carbonate
Option 4: magnesium carbonate
Question : What is the chemical name of Marble?
Option 1: Magnesium oxide
Option 2: Sodium hydroxide
Option 3: Calcium hydroxide
Option 4: Calcium carbonate
Question : The main mineral constituents of the continental mass are ____ and ____.
Option 1: silica, magnesium
Option 2: silica, alumina
Option 3: oxygen, carbon
Option 4: alumina, magnesium
Question : The oceanic crust mainly consists of _____ and _____.
Option 1: silica, alumina
Option 2: silica, magnesium
Option 3: magnesium, alumina
Option 4: iron, alumina
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