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Q. When Hydrogen starts burning in air, it produces
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Q. Which of the following determines the chemical properties of an element?
Q. Potassium nitrate is used in
Q. The chemical name of quartz is ______
Q. The total energy of revolving electron in an atom
Q. Which of the following is true of a scientific theory?
Q. The richest source of vitamin D is?
Q. The time of exposure required for taking photograph of an object depends upon –
Q. The SI unit mobility of charge (μ) is:
Q. For transfusion, the O blood group of a Donor can be accepted by a person having blood group
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