Chemistry-12-Acids, Bases and Salts

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1.
Which among the following is popularly called Hypo?
2.
Which among the following element is an essential constituent of acids?
3.
Which among the following oxides cause the Acid rain?
4.
Which among the following acids is abundant in Grapes, Bananas and Tamarind?
5.
The aqueous solution of which among the following acids is called Vinegar?
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