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Which of the following is an Inert Gas?
An instrument used for measuring depth of an ocean is called?
Man first landed on the surface of the Moon in :
Who invented Dynamite?
In medical terminology, USG stands for:
To an astronaut in space, the sky appears to be:
The salinity of the sea water is:
If a sample of soil is found to have a pH value of 8.25, it is:
Hydro?uoric acid is not kept in glass bottles because it reacts with:
The stars twinkle at night because:
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