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JEE Main 2025 Apr 3 Shift 1, Chemistry Q8: Mole Concept And Equivalent Concept

JEE Main2025Apr 3, Shift 1Chemistry
Q.

Among g (each) of the following elements, which one will have the highest number of atoms?

Element : Pb, Po, Pr and Pt

  1. A

    Po

  2. B

    Pr

  3. C

    Pb

  4. D

    Pt

Solution

For a fixed mass , the number of atoms is , which is inversely proportional to molar mass . The element with the smallest molar mass therefore yields the largest atom count.

Approximate molar masses (g mol): Pr , Pt , Pb , Po .

Pr has the lowest molar mass, so g of Pr contains the most atoms.

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