IIT-JEE 2005 Screening | Structure of Atom Question 26 | Chemistry

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IIT-JEE 2005 Screening

MCQ (Single Correct Answer)

-0.25

The number of radial nodes of 3s and 2p orbitals are respectively

2, 0

0, 2

1, 2

2, 1

IIT-JEE 2004 Screening

MCQ (Single Correct Answer)

-0.25

The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?

He⁺ (n = 2)

Li²⁺ (n = 2)

Li²⁺ (n = 3)

Be³⁺ (n = 2)

IIT-JEE 2003 Screening

MCQ (Single Correct Answer)

-0.5

Which of the following pairs are isoelectronic and isostructural?
$$NO_3^-$$, $$CO_3^{2-}$$, $$ClO_3^-$$, SO₃

$$NO_3^-$$, $$CO_3^{2-}$$

SO₃, $$NO_3^-$$

$$ClO_3^-$$, $$CO_3^{2-}$$

$$CO_3^{2-}$$, SO₃

IIT-JEE 2002 Screening

MCQ (Single Correct Answer)

-0.5

If the nitrogen atom has electronic configuration 1s⁷, it would have energy lower than that of the normal ground state configuration 1s²2s²2p³, because the electrons would be closer to the nucleus. Yet 1s⁷ is not observed because it violates

Heisenberg uncertainty principle

Hund's rule

Pauli exclusion principle

Bohr postulate of stationary orbits

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