Eng / Medical Entrance Chemistry

32. The angular momentum of an electron in an atomic orbital depends upon:
(a) principal quantum number (b) azimuthalquantum number
(c) magnetic quantum number (d) spin quantum number
33. The designation of a subshell with n = 4 and l = 3 is:
(a) 4s (b) 4p (c) 4d (d) 4f
34. Which of the following sets of quantum numbers is allOwed?
(a) n = 2, / 1, m 0, s=+ 1/2 (b) n = 2, / = 2, m = —1, s = — 1/2
(c) n = 2, / = —2, m 1, s 1/2 (d) n = 2, / = 1, m = 0, s = 0
35. The quantum numbers for the electrons present in the valence shell of an element are given below:
n = 2, / = 0, m = 0, s = + 1/2. The atom is:
(a) Lithium (b) Beryllium (c) Hydrogen (d) Boron
36. An orbital with l.= 0 is symmetrical about the:
(a) X-axis only (b) Y-axis only
(c) Z-axis only (d) nucleus
37. In Aufbau principle, the word `Aufbau':
(a) represents the name of scientist who developed the principle
(b) is a German word which means "building up"
(c) is related to the energy of the electron
(d) is related to angular momentum of the electron
38. The electronic configuration of 7N14 is
1S2 2s2 2pix 2py1 2pzi and not
2s2 2p2
1s2 2ply . This is accordance with:
(a) Pauli's exclusion principle (b) Hund's rule
(c) Aufbau principle (d) Fajan's rule
39. Which of the following has maximum number of unpaired elec- trons?
(a) Cu2+ (b) Cr3+ (c) Ni2+ (d) Fe3+
Labour India Plus Two Digest (Science)
4110111 Wad Plus TWO Digest
10. Which of the following species is diamagnetic?
(a) I' (Z = 22), (b) Zn2+ (Z = 30)
N t
(c) (Z = 28) (d) Ce+ (Z = 24)
i I There is no difference between a 2p and a 3p orbital regarding: (a) shape (b) size (c) energy (d) value of n
11. total number of electrons that can be accommodated in all the
orbitals having principal quantum number 2 and azimuthal quantum number 1 is:
(a) 2 '(b) 4 (c) 6 (d) 8
In a Potassium atom, electronic energy levels are in the following order:
(a) 4s > 3d (b) 4s > 4p (c) 4s < 3p (d) 4s < 3d
1.1. I i he Planck's constant, h = 6.6 x Js, the de Broglie wavelength of a
panicle having momentum of 3.3 x 10-24 kg ms-1 will be:
0 0 0 0
(a) 0.002 A (b) 0.5 A (c) 2 A (d) 500 A
4). uncertainty in the momentum of an electron is 1.0 x 10-5 kg ms-4.
The uncertainty in its Position will be: (h = 6.62 x 10-34 kg m2 s-')
(b) 1.05 x 10-26 m
(d) 5.25 x 1028 m
.1(). Iliwn -Haber cycle is used to determine:
(a) Electronegativity (b) Lattice energy
(c) Both (a) and (b) (d) None
•1 Which one is the highest melting halide?
(a) NaC1 (b) NaF (c) NaBr
I S. l'he dative bond is present in:
(a) NI13 (b) SO3 (c) PC15 (d) BF3
19. Zeise's salt contains which type of bonds?
(a) Ionic (b) Ionic and covalent
(c) I I ydrogen bonds (d) Ionic, covalent and coordinate bonds
)(I. Which among the following molecules is not flat?
(a)('(,116 (b) C H
2 4 (c) SO3 (d) C2H6