Question

Long Answer Type Questions


1 some deposit were observed in water preserved in aluminium containers after two three days what could the deposite be what is the reason for the formation of these deposit

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2. Explain that carbon dioxide is an acidic oxide with the help of an activity.

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3. Explain five methods which are used to prevent the rusting of an iron article.

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4 when a chemical change takes place then new substances with new properties are formed what are the the other changes take place with the formation of new substances ?

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Class 7​

Answer 1

Answer:

ans 2Carbon dioxide has no hydrogen so it is not an acid itself. But like many non-metal oxides, carbon dioxide can dissolve in water to give an acidic solution. Carbon dioxide is an acidic oxide on the basis that it dissolves in water to form carbonic acid, which is an acid.