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The type of glass used in making lenses and prisms is
1 Soft glass
2 Pyrex glass
3 Jena glass
4 Flint glass
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The difference between a nuclear reactor and an atom bomb is that 1 No chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction 2 No chain reaction takes place in atomic bomb while it takes place in a nuclear reactor 3 The chain reaction in nuclear reactor is controlled 4 None of these
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Biological Sciences 
