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After removing two electrons from helium atom it become?

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Atomic packing factor of body centred cubic structure (bcc) is

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A nuclear reactor is said to have become 'critical' when

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Nuclear reactors used to produce electricity are based on

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The energy obtained from atoms is known as ________

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Which, of the following radiations has the least wavelength ?

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For Gamma radiation, what stops its penetrating abilities?

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An atom bomb based upon the principle of ________

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The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in :

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Radioactivity is due to

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What is the range of Strong Nuclear force?

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Name the process of production of energy in the Sun

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Which type of reaction produces the most harmful radiation ?

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Energy is continuously created in the sun due to:

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The mass defect is the result of what action occurring?

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Which one of the following wavelengths of light is most effective in photosynthesis ?

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The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is

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An electron microscope gives higher magnification than an optical microscope, because :

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The magnifying power of an astronomical telescope can be decreased by

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The light rays used for eliminating bacteria is

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