IIT-JEE 2002 Screening | Structure of Atom Question 31 | Chemistry

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

IIT-JEE 2001 Screening

MCQ (Single Correct Answer)

-0.25

The wavelength associated with a golf ball weighing 200 g and moving at speed of 5 m/h is of the order

10^-10 m

10^-20 m

10^-30 m

10^-40 m

IIT-JEE 2001 Screening

MCQ (Single Correct Answer)

-0.25

The quantum numbers +1/2 and -1/2 for the electron spin represent

rotation of the electron in clockwise and anticlockwise direction respectively

rotation of the electron in anticlockwise and clockwise direction respectively

magnetic moment of the electron pointing up and down respectively

two quantum mechanical spin states which have no classical analogue

IIT-JEE 2000 Screening

MCQ (Single Correct Answer)

-0.25

The number of nodal planes in a p_x orbital is

one

two

three

zero

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