Who developed atom bomb ?
1). Warner Wan Brown
2). J. Robert Open heimer
3). Edward Taylor
4). Samuel Koehen
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2. Synthetic detergents are made from
3. Preparation of ‘Dalda or Vanaspati’ ghee from vegetable oil utilizes the following process :
4. When cone H2S04 is added to dry KNO3 brown fumes are evolved. These fumes are due to
6. Which one of the following elements is used in the manufacture of fertilizers?
7. Aspirin is
8. Which of the following elements is non radioactive
9. Total number of halogen elements found in the periodic table is