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प्रश्न 1 सफेदी के पश्चात दीवारों पर चमक का कारण -
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জাৰণ বিক্ৰিয়া।।।।।।।।।।।।।।।
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Reaction of calcium hydroxide with carbon dioxide.
Explanation:
The main reason is the reaction of calcium hydroxide with carbon dioxide
In whitewash Calcium hydroxide is available. Calcium hydroxide responds gradually with the carbon dioxide in air to shape a dainty layer of calcium carbonate on the dividers. Calcium carbonate is shaped following a few days of white washing and gives a sparkly completion to the dividers.
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