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प्रश्न
Helium is preferred to be used in balloons instead of hydrogen because it is ____________.
विकल्प
incombustible
lighter than hydrogen
more abundant than hydrogen
non-polarizable
MCQ
रिक्त स्थान भरें
उत्तर
Helium is preferred to be used in balloons instead of hydrogen because it is incombustible.
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