The chief constituent of vinegar is
1). Formic acid
2). Acetic acid
3). Salycylic acid
4). Oxalic acid
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1. Cooking gas is a mixture of
2. The total energy of revolving electron in an atom
4. Chemical name of bleaching powder is
5. An important green-house gas other than methane being produced from the agricultural fields is
6. Detergents clean surfaces on the principle of
7. Which of the following measures will not increase a nation's wealth?
8. Which one of the following is commonly used for pulp bleaching in the paper industry?