JEE Main 2019 (Online) 10th April Evening Slot | Structure of Atom Question 98 | Chemistry

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

-1

The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are :

Paschen and Pfund

Balmer and Brackett

Lyman and Paschen

Brackett and Pfund

JEE Main 2019 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

The isoelectronic set of ions is :

F^–, Li⁺, Na⁺ and Mg²⁺

Li⁺, Na⁺, O^2- and F^-

N^3–, O^2-, F^- and Na⁺

N^3–, Li⁺, Mg²⁺ and O^2-

JEE Main 2019 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

The graph between $${\left| \psi \right|^2}$$ and r (radial distance) is shown below. This represents :

JEE Main 2019 (Online) 10th April Morning Slot Chemistry - Structure of Atom Question 99 English

3s orbital

2s orbital

2p orbital

1s orbital

JEE Main 2019 (Online) 9th April Evening Slot

MCQ (Single Correct Answer)

-1

Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect ? (The Bohr radius is represented by a₀)

The probability density of finding the electron is maximum at the nucleus.

The electron can be found at a distance 2a₀ from the nucleus

The total energy of the electron is maximum when it is at a distance a₀ from the nucleus.

The magnitude of potential energy is double that of its kinetic energy on an average.

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