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Q. Who discovered Penicillin?
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Q. Brass gets discoloured in air because of the presence of which of the following gases in air?
Q. If you float on your back on water, your weight is-
Q. In Real Magnifying Lens is a –
Q. Which instrument is used for photographing the Sun
Q. Iron filings can be separated from a heterogenous mixture using the technique of:
Q. Which instrument measures the intensity of earthquake shocks?
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