Which one of the following takes place during a nuclear fusion?
1). a heavy nucleus bombarded by neutrons breaks up
2). a heavy nucleus breaks up spontaneously
3). two light nuclei combine to form a heavy nucleus
4). a light nucleus breaks up spontaneously
2. Which of the following is used to increase the antiknocking property of petrol
4. Which of the following processes is used for the production of Biodiesel
6. Fermentation of milk to curd is due to :
7. How many neutrons are there in 92U238 atom ?
8. Which one of the following is radioactive ?