Curd is sour due to presence of
1). Tartaric acid
2). Lactic acid
3). Acetic acid
4). Oxalic acid
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1. Which of the following is secondary air pollutant ?
2. What is the chemical name for ‘Baking Soda’ ?
3. Which of the following substance is highly plastic ?
4. The element used for making solar cells is
5. Question 15.1:Explain the terms polymer and monomer.
6. Which of the following could be used as fuel in propellant or rockets ?
7. Ethanol containing 5% water is known as :
8. Which one of the following is also known as solution ?
9. Which variety of coal contains recognizable traces of the original plant material ?