Question : Gelena is a mineral of
Option 1: Iron
Option 2: Gold
Option 3: Lead
Option 4: Calcium
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Correct Answer: Lead
Solution : The correct option is - Lead.
Gelena, commonly known as galena, is a mineral composed primarily of lead sulfide (PbS). It is one of the most important ores of lead and is widely distributed throughout the world.
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Question : Pregnant women usually become deficient in
Option 1: Sodium and Calcium
Option 2: Iron and Sodium
Option 3: Calcium and Iron
Option 4: Magnesium and Iron
Question : Which rock is found in association with rocks composed of calcium carbonates?
Option 1: Limestone
Option 3: Iron
Option 4: Diamond
Question : Calcium salt used as fertilizer is
Option 1: Calcium Carbide
Option 2: Calcium Carbonate
Option 3: Calcium Cyanide
Option 4: Calcium Sulphate
Question : Malachite is an ore /mineral of?
Option 1: Lead
Option 2: Manganese
Option 3: Mercury
Option 4: Copper
Question : What is the product of a reaction of calcium carbonate, water, and carbon dioxide?
Option 1: Calcium oxide
Option 2: Calcium hydroxide
Option 3: Hydrochloric acid
Option 4: Calcium Hydrogen Carbonate
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