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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.
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
Write the balanced chemical equation for the above reaction.
What happens when carbon dioxide is passed through lime water first in small amounts and then in excess ?
Give reason for the following:
Solid carbon dioxide is used for refrigeration of food.
Fill in the blank
Carbon monoxide bums in air with a .............. flame to form carbon dioxide.
Fill in the blank:
Carbon monoxide is a products of..................combustion.
Why is carbon monoxide called silent killer ?
Give reason why carbon monoxide is considered a highly poisonous gas. State why it is dangerous to be in the vicinity of smokers.
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.
Give reason for the following:
Lime water finds application for testing both carbon dioxide & carbon monoxide gas individually.
