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प्रश्न
‘When carbon dioxide is bubbled into lime water, the lime water turns milky and when bubbled in excess the milkiness disappears’. Give balanced equations to support the statement.
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उत्तर
\[\ce{\underset{\text{Lime water}}{Ca[OH]2} + CO2 ->\underset{\text{(Insoluable) milky}}{CaCO3↓} +H2O}\]
When CO2 is passed in excess, milkiness disappears due to formation of bicarbonate which is soluble in water.
CaCO3 + H2O + CO2 → Ca[HCO3]2
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संबंधित प्रश्न
Give reason for the following:
Solid carbon dioxide is used for refrigeration of food.
Fill in the blank
....................... is formed when carbon is burnt in a limited supply of air or oxygen.
Carbon monoxide burns in air with a ______ flame to form carbon dioxide.
Give two uses of carbon monoxide.
Explain the reducing action of carbon monoxide.
Write two remedies for carbon monoxide poisoning.
FILL IN THE BLANK
Carbon when heated in limited supply of air forms..................
Give reason why carbon monoxide is considered a highly poisonous gas. State why it is dangerous to sleep in a closed room with a fuel burning.
State how carbon monoxide finds application in preparation of an alcohol. [Give balanced equations for the same]
Give a balanced equation for the following conversion: [In one or two steps]
Lime water [soln. of calcium hydroxide] to calcium bicarbonate.
