Question : Milkiness observed on passing of carbon dioxide through lime water is due to the formation of:
Option 1: calcium hydroxide
Option 2: calcium bicarbonate
Option 3: calcium carbonate
Option 4: calcium chloride
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Correct Answer: calcium carbonate
Solution : The correct answer is calcium carbonate.
Lime water is chemically known as calcium hydroxide, which turns milky when carbon dioxide is passed through it. When carbon dioxide reacts with calcium oxide, it leads to the formation of calcium carbonate. It is a milky white precipitate. It is shown by the reaction: ca(OH)2 + CO2 -> CaCO3.
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Question : Which among the following is a covalent compound?
Option 1: Hydrogen chloride
Option 2: Magnesium hydroxide
Option 3: Calcium carbonate
Option 4: Sodium chloride
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 : Which of the following compounds is used as a drying agent?
Option 1: Calcium oxide
Option 2: Gypsum
Option 3: Calcium chloride
Option 4: Calcium hydroxide
Option 1: Calcium chloride
Option 2: Magnesium fluoride
Option 3: Sodium chloride
Option 4: Carbon tetrachloride
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
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