1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Consider the ground state of Cr atom (Z = 24). The number of electrons with the azimuthal quantum numbers, l = 1 and 2 are respectively
A
16 and 4
B
12 and 5
C
12 and 4
D
16 and 5
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The wavelength of the radiation emitted when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097 $$\times$$ 107 m-1)
A
406 nm
B
192 nm
C
91 nm
D
9.1 $$\times$$ 10-8 nm
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Which one of the following sets of ions represents the collection of isoelectronic species? (Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)
A
K+, Cl-, Mg2+, Sc3+
B
Na+, Ca2+, Sc3+, F-
C
K+, Ca2+, Sc3+, Cl-
D
Na+, Mg2+, Al3+, Cl-
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Which one of the following groupings represents a collection of isoelectronic species? (At. nos. : Cs : 55, Br : 35)
A
N3-, F-, Na+
B
Be, Al3+, Cl-
C
Ca2+, Cs+, Br
D
Na+, Ca2+, Mg2+
JEE Main Subjects
EXAM MAP