Which is the most stable ecosystem?
1). Desert
2). Mountain
3). Ocean
4). Forest
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1. Which one of the following pairs is NOT correctly matched?
2. Hydrogen bomb is based on the principle of
3. The resources which can be used continuously year after year ate called
4. Alcoholic ( OH) group can be identified by
5. What is viewed through an electron microscope?
6. Which one of the following has the highest value of specific heat?
7. The first metal used by a man was
8. In which of the following substances all carbon atoms are quaternary in nature ?
9. In upper layer of atmosphere ozone is formed
10. 'No two electrons in an atom can have the same set of four quantum numbers' is