NEW
New Website Launch
Experience the best way to solve previous year questions with mock tests (very detailed analysis), bookmark your favourite questions, practice etc...
1

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)
The angular momentum of electron in 'd' orbital is equal to
A
$$2\sqrt 3 h$$
B
0 $$\hbar $$
C
$$\sqrt 6 \,\hbar $$
D
$$\sqrt 2 \,\hbar $$

Explanation

We know Anglular momentum = $$\sqrt {l(l + 1)}h $$

For d obtial l = 2

$$ \therefore $$ Angular momentum = $$\sqrt {6}h $$
2

AIPMT 2015

MCQ (Single Correct Answer)
Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. Z = 22)
A
4s 3s 3p 3d
B
3s 3p 3d 4s
C
3s 3p 4s 3d
D
3s 4s 3p 3d

Explanation

Ti (22) $$ \Rightarrow $$ 1s2 2s2 2p6 3s2 3p6 4s2 3d2

$$ \therefore $$ Order of increasing energy is 3s, 3p, 4s, 3d
3

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)
The number of d-electrons in Fe2+ (Z = 26) is not equal to the number of electrons in which one of the following ?
A
d-electrons in Fe (Z = 26)
B
p-electrons in Ne (Z = 10)
C
s-electrons in Mg (Z = 12)
D
p-electrons in Cl(Z = 17)

Explanation

Number of d-electrons in Fe2+ = 6

Number of p-electrons in Cl = 11
4

AIPMT 2014

MCQ (Single Correct Answer)
Be2+ is isoelectronic with which of the following ions ?
A
H+
B
Li+
C
Na+
D
Mg2+

Explanation

Be2+ has 2 electrons and also Li+ has 2 electrons so Be2+ and Li+ are isoelectronic

Joint Entrance Examination

JEE Main JEE Advanced WB JEE

Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

Medical

NEET

CBSE

Class 12