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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
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
....................... 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.
Fill in the blank:
Carbon monoxide is a products of..................combustion.
How is carbon monoxide gas formed?
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 be in the vicinity of smokers.
