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Chemistry
2. Acids, Bases and Salts
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Q13 of 48 Page 2

What happens when nitric acid is added to an eggshell? (CBSE 2005)

Since egg shell is made of calcium carbonate. And we know that when calcium carbonate (CaCO3) reacts with nitric acid (HNO3) then carbon dioxide, calcium nitrate and water are formed. So same reaction happens when nitric acid is added to an eggshell.


CaCO3 + 2HNO3→ Ca(NO3)2 + CO2 + H2O

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A milkman adds a very small amount of baking soda to fresh milk.
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(b) Why does this milk take a longer time to set as curd? (CBSE 2012,2011)

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What happens when crystals of washing soda are kept open in the air for long time? (CBSE 2009)

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What happens when an acid or a base is added to the water? Why does the beaker appear warm? Why should we always add acid or base to the water and not water to the acid or base? (CBSE 2008)

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2. Acids, Bases and Salts
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