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WorksheetsChemistry Unit 2 Test
Total questions: 40
Worksheet time: 3600secs
Radius of an electron in 1s is _____ than 2s
Higher
Equal
Lower
2s does not exist
Number of electrons and orbitals in a subshell can be determined by
n2, 2n
n, 2n
2(2l+1), 2l+1
2s does not exist
The highest energy electron of an element in the ground state is characterized by the following quantum numbers n = 3, l = 0 , m = 0 , s = + ½ identify the element
Al
Na
P
N
Which of the following have same number of unpaired electron as in Mn2+
Mn+4
Fe+3
Fe+2
Cu+1
The element whose electronic configuration is 1s2, 2s2, 2p6, 3s2, 3p3 belongs to ______period and ____ group of periodic table
3rd , IIA
3rd , VA
2nd , IIA
3rd , VIA
If the last electron is filled in 3d subshell. The next coming electron will move into
4s
4p
4d
4f
The last electron in the Na and K can be distinguished by
Principal quantum number
Azimuthal quantum number
Magnetic quantum number
Spin quantum number
Without applying Hund’s rule the electronic configuration of one of the following cannot be justified
Fluorine
Neon
Sodium
Phosphorous
The positive rays have maximum e/m value when one of the following gas is used in discharge tube
O2
N2
F2
Cl2
Electronic configuration is the distribution of electrons in
Sub-shells in their decreasing energy order
Shells in their decreasing energy order
Outermost shells only
Shells and sub shells with increasing energy order
The possible correct set of quantum numbers (n; l; m; s) is
n = 3, 1 = 3, m = +3, s = -1/2
n = 4, 1 = 3, m = +4, s = -1/2
n = 4, l=3, m =+2, s= -1/2
n = 2, l = 1, m = +2, s = -1/2
Which pair of species have electronic configuration ends on 2s22p in their highest occupied energy level
Ca2+, Ar
Na+, O2-
Na+, Ca2+
Ar, O2-
Which of the following will have highest e/m value
Canal rays
Hydrogen ion
Beta-rays
Alpha-particles
The deflection of positive rays in magnetic field will be
Toward north pole
Toward south pole
Toward cathode
Perpendicular to magnetic field
Mass of Proton is approximately equal to
Mass of electron
Mass of C-12
Mass of Hydrogen atom
Mass of oxygen atom
A di-positive cation has 27 e- and 65 nucleon number. No of neutron in ion will be
32
36
39
38
Which of the following order us correct with respect to number of protons
H- > H > H+
H+ > H- > H
H > H- > H+
H-—H—H-
SO42 and PO43 have same
Nuclear charge
Number of electron
Number of proton
Nucleon number
Mass of proton is
1.6726 x 10-27g
1.6726 x 10-24 Kg
1.6726 x 10-27g
1.6726 x 10-24mg
λ of indigo color is 400nm approximately. The wave number of above mentioned color will be.
400 x 10-9m-1
2.5 x 10+6 m-1
2.5 x 10-5 m-1
2.5 x 10-4m-1
A photon of greater wavelength will have
Greater frequency
Greater energy
Smaller wave number
Greater wave number
Which of the following is true relationship between principal and azimuthal quantum number?
n=l
n>l
n < l
n = ±l
Number of subshells In a shell are determined by using
n
2n2
n2
n2/2
When an atom goes in excited state it violates
Auf Ban principle
Hund’s rule
Pauli’s exclusion principle
All of these
Electron will be placed first in
7s
6p
6d
4f
How many orbitals having electrons will be present in an atom with atomic number 29?
10
15
20
29
2p and 3p subshells may have same
Energy
Size
Number of electron
Principal quantum number
An unknown element having electronic configuration [Ne] 3 s2, 3p3 can form
Uni-negative ion
Tri-Negative ion
Di-Positive ion
Uni-Positive ion
Atoms of two different elements having same nucleon number but different proton number are called
Isotopes
Isotones
Isobars
Isoelectronic
The isotone of C-14 is
How do the ‘p ’ orbitals px, py, pz differ from each other
Size
Shape
Orientation
Capacity
Which of the following formulae represents a particle with the composition 1 proton, 1 neutron and 2 electrons? (D represents deuterium, 2H)?
D
D-
H
H-
Which of the following rules or principles helps us to predict valency of the element?
Hund’s rule
Pauli’s exclusion principle
Aufbau principle
Heisenberg’s uncertainty principle
The lobes of d-orbitals lie between the axis:
First two
In all axis
First three
None of these
Which set of 4 quantum numbers, n, ℓ, m and s are unacceptable for any system?
A
B
C
D
The probability of finding an electron……………. Even at large distances from the nucleus:
Becomes one
Never becomes zero
Becomes zero
Varies from 0 to 1
What is the proton number of an element that has 6 unpaired electrons?
6
16
14
24
An electron in an atom is completely described by its
2 quantum numbers
4 quantum numbers
Only 1 quantum number
3 quantum numbers
What kind of atomic orbital must be available for the electrons with the principal quantum number n=2?
A spherically shaped orbital
Either s or p-orbital
The orbital close to the nucleus
A dumb-bell shaped orbital
The total number of electrons in Ne with s=+1/2 is/are
1
10
5
15
