Milk tastes sour when kept in the open for sometime due to the formation of .
1). lactic acid
2). citric acid
3). acetic acid
4). carbonic acid
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1. Which one of the following gases has the highest calorific value?
2. Hard water and soft water can be distinguished by using
3. The enzyme that converts glucose to ethyl alcohol is :
4. Entropy of Universe is always
5. Which of the following elements is non radioactive
6. Nonstick kitchenwares are coated with
7. Natural rubber is the polymer of:
9. The gas produced in marshy places due to decomposition of vegetation is
10. Which one of the following metals does not react with water to produce Hydrogen ?