Rewrite these sentences using gerunds 4. Lemon juice is used to clean stained surfaces in the kitchen.
5. Satyaki likes to visit historical places during holidays.
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Answer:
When a copper vessel is exposed to moist air for a long time, a dull green colored layer is formed on it. This greenish layer is a mixture of copper hydroxide (Cu(OH)
2
) and copper carbonate (CuCO
3
).
The reaction is
2Cu+H
2
O+CO
2
+O
2
⟶Cu(OH)
2
+CuCO
3
As these products are basic in nature, to clean them lemon or tamarind juice-like acidic substances are needed. These sour substances are effective in cleaning the copper vessels hence are considered for cleaning.
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Answer: it,s so easy come on
Explanation:
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