Chemical properties of isotopes .............
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Which one of the following is not a borderline element?
A hollow hemispherical bowl is made of silver with its outer radius 8 cm and inner radius 4 cm respectively. The bowl is melted to form a solid right circular cone of radius 8 cm. The height of the cone formed is
cos(A+B) + cos(A-B) is equal to
In which one of the following cities are the Summer Olympics, 2020 going to be held?
Who Invented FM Radio?
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Which film has been awarded with best Environment film in 64th National film awards?