Hydrogen bomb is based on the principle of
1). controlled fission reaction
2). uncontrolled fission reaction
3). controlled fusion reaction
4). uncontrolled fusion reaction
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1. 'Yellow cake' an item of smuggling across broder is-
2. German silver an alloy does not contain the metal
3. The acid used in lead storage cells is
4. The most abundant inert gas in the atmosphere is
5. Fe has 26 protons in its nucleus. What are the number of electrons in Fe2+ (II) ion?
6. Which of the following is ozone depleting pesticide ?
7. The 'Blue Water Policy' was introduced by the Portugese leader_________
8. What is the name of the acid in grapes?
10. Which of the following elements has the lowest melting point?