1

### IIT-JEE 1998

The orbital diagram in which the Aufbau principle is violated is
A
B
C
D
2

### IIT-JEE 1997

For a d-electron the orbital angular momentum is
A
$\sqrt 6 \left( {h/2\pi } \right)$
B
$\sqrt 2 \left( {h/2\pi } \right)$
C
$\left( {h/2\pi } \right)$
D
$2 \left( {h/2\pi } \right)$
3

### IIT-JEE 1996

The orbital angular momentum of an electron in 2s orbital is
A
$+ {1 \over 2}.{h \over {2\pi }}$
B
Zero
C
${h \over {2\pi }}$
D
$\sqrt 2 .{h \over {2\pi }}$
4

### IIT-JEE 1995 Screening

A 3p orbital has
A
two non spherical nodes
B
two spherical nodes
C
one spherical and one non spherical node
D
one spherical and two non spherical nodes