Chemistry Chapter 2 Mock Test

Which of the following pair of orbitals posses two nodal planes?

\(d_{Z^{2}},d_{x^{2}-y^{2}}\)
\(P_{xy},d_{zx}\)
\(d_{xy},d_{zx}\)
\(P_{xy},d_{x^{2}-y^{2}}\)

Statement 1 : Cathode rays do not travel in straight lines.

Statement 2 : Through thick sheets, the cathode rays penetrate.

Both statement 1 and statement 2 are true and the statement 2 is the correct explanation of the statement 1.
Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of the statement 1.
Statement 1 is true but statement 2 is false.
Statement 1 is false but statement 2 is true.

The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state if the ionization energy of hydrogen atom is – 13.6 eV. (Avogadro’s constant = 6.022 x 10²³)

\(1.69 \times 10_{25} J\)
\(1.69 \times 10_{23} J\)
\(1.69 \times 10_{23} J\)
\(1.69 \times 10_{20} J\)

Find from the following that has maximum energy.

What is the shape of s-orbital?

Tetrahedral
Pyramidal
Spherical
Dumb-bell shaped

Find the four quantum number for the valence shell electron or last electron of sodium (Z = 11)?

n = 3, I =2, m = 2, s = + \(\frac{1}{2}\)
n = 3, I =2, m = -2, s = – \(\frac{1}{2}\)
n = 3, I =0, m = 0, s = + \(\frac{1}{2}\)
n = 2, I =2, m = 1, s = – \(\frac{1}{2}\)

Set of quantum numbers which is not allowed is:

n = 2, I = 1, m = 0, s = – \(\frac{1}{2}\)
n = 2, I = 1, m = 1, s = + \(\frac{1}{2}\)
n = 1, I = 1, m = 0, s = – \(\frac{1}{2}\)
n = 1, I = 0, m = 0, s = + \(\frac{1}{2}\)

What is the shape of the orbital when the azimuthal quantum number has a value of I = 1?

Complicated
Dumb-bell
Unsymmetrical
Spherically symmetrical

Statement 1 : \(3d_z ^2\) orbital is spherically symmetrical.

Statement 2 : \(3d_z ^2\)orbital is spherical in shape which is the only d-orbital.

Both statement 1 and statement 2 are true and the statement 2 is the correct explanation of the statement 1.
Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of the statement 1.
Statement 1 is true but statement 2 is false.
The statement 1 and statement 2 both are false.

When beryllium is bombarded with \(\alpha\)-particles_: extremely penetrating radiations which cannot be deflected by magnetic field or electrical field are given out. These are

\(\alpha\)-rays
a beam of protons
X-rays
a beam of neutrons

Find the total number of unpaired electrons in d – orbitals of atoms of element of atomic number 29.

1
0
5
10

Which one of the following is correct for the nuclides?

They have specific atomic numbers
They have same number of protons
They have specific atomic and mass numbers
They have specific atomic and mass numbers

Find the number of orbitals in d sub-shell.

7
5
3
1

Who proposed the dual nature of particles?

Schrodinger
de-Broglie
Lowry
Heisenberg

Find the number of unpaired electrons in an o\(_{2}\) molecule.

3
2
1
0

What is the electronic configuration of ferric ion?

[Ar] \({3}{d^{8}}\)
[Ar] \({3}{d^{3}}\)
[Ar] \({3}{d^{7}}\)
[Ar] \({3}{d^{5}}\)

The nitrogen atom contain 7 electrons and 7 protons, the nitride ion \(N^{-3}\) will have

10 protons and 7 electrons
4 protons and 10 electrons
4 protons and 7 electrons
7 protons and 10 electrons

What will be the shape of \(d_{xy}\) orbital?

trigonal
circular
dumb-bell
double dumb-bell

Which of the following statement (s) is (are) correct?

In silver atom, 23 electrons have a spin of one type and 24 of the opposite type (Atomic no. of Ag =47).
The electronic configuration of Cr is [Ar] \({3d}^{5}{4s}^{x}\) (Atomic no. of Cr = 24).
The magnetic quantum number may have a negative value.
All of above.

Which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields in a multi-electron atom?

(1) n = L I = 0, m = 0

(2) n = 2,l = 0, m = 0

(3) n = 2,1 = 1, m = 1

(4) n = 3,1 = 2, m = 0

(5) n = 3,1=2, m = 0

(4) and (5)
(3) and (4)
(2) and (3)
(1)and(2)

______has more unpaired d-electrons.

\(Cu^{+}\)
\(N^{3+}\)
\(Fe^{2+}\)
\(Zn^{+}\)

de-Broglie equation is given by:

\(\lambda\)=\(\frac {h}{mv}\)
E=m\({c^2}\)
E=hv
n\( \lambda\)=2dsin\( \theta\)

The electronic configuration of an element with atomic number 17 is represented by:

\( {1}{s}^{2}\), \( {2}{s}^{2}\) \({2}{p}^{6}\),\({3}{s}^{1}\), \({3}{p}^{4}\), \({4}{s}^{2}\)
\( {1}{s}^{2}\), \({2}{s}^{2}\)\({2}{p}^{6}\), \({3}{s}^{2}\)\({3}{p}^{5}\)
\( {1}{s}^{2}\), \( {2}{s}^{2}\) \({2}{p}^{6}\),\({3}{s}^{2}\), \({3}{p}^{4}\) \({4}{s}^{1}\)
\( {1}{s}^{2},\)\({2}{s}^{2}\), \({2}{p}^{6}\),\({3}{s}^{1}\)\({3}{p}^{6}\),

Element which is represented by the following electronic configuration is

Neon
Fluorine
Oxygen
Nitrogen

The electron is________

positron.
hydrogen ion.
\(\beta\)- ray particle.
\(\alpha\)- ray particle.

For given energy E = 3.03 \(\times{10}^{-19}\)Joules, what is the corresponding wavelength?!( h =\( 6.626\times{10}^{-34}J sec\), c =\( 3\times{10}^{8}m/sec\))

6.56 nm
65.6 nm
3.4 nm
656 nm

According to photoelectric effect, the kinetic energy of the ejected electrons is directly proportional to which one of the following property?

Intensity of light
Wavelength of light
Frequency of light
Velocity of incident radiation

Find the total number of orbitals having I = 3 for principle quantum number n = 4.

9
5
7
3

What kind of charge does neutron have?

Negative charge
Positive charge
No charge
All are correct

Find the number of protons, neutrons and electrons in the element \( ^{231}_{89}Y\)

89, 71, 89
89, 89, 242
89, 142, 89
89, 231, 89

Find the number of electrons in cl^– ion.

35
20
19
18

In ionization energy of H-atoms is 13.6 eV. then what is the ionization energy of \( He^{-}\) ion?

27.2 eV
13 6 eV
6.8 eV
54.4 eV

Neutron is a fundamental particle which carries

a charge of -1 and a mass of 1 unit.
a charge of +1 unit and a mass of 1 unit.
no charge and a mass of 1 unit
no charge and no mass.

Energy of H-atom in the ground state is -13.6 eV, what is the energy in the second excited state?

-6.8 eV
-3.4 eV
-1.51 eV
-4.53 eV

has the maximum number of unpaired electrons______________.

\({Fe^{2+}}\)
\({V^{3+}}\)
\({Ti^{3+}}\)
\({Mg^{2+}}\)

An atom has 26 electrons and its atomic weight is 56. What will De the number of neutrons in the nucleus of the atom?

56
36
30
26

Experimental evidence for the existence of the atomic nucleus derived from

atomic emission spectroscopy
alpha scattering oy a thin metal foil
Millikan’s oil drop experiment
the magnetic bending of cathode rays

Which of the following have the same number of unpaired electrons in’d’ orbitals?

\({Fe^{3+}}\)
Cr
Mn
All of these

Which particles are equivalent in neutral atom?

\(p^+,n^0\)
\(e^-,p^+\)
\(e^-, e^+\)
\(p^+, e^+\)

Rutherford’s alpha particle scattering experiment finally led to the conclusion that

the point of impact with matter can be precisely determined
neutrons are buried deep in the nucleus
electrons occupy space around the nucleus
mass and energy are related

What does azimuthal quantum number define?

magnetic momentum of electron
angular momentum of electron
spin of electron
e/m ratio of electron

Find the maximum number of electrons that can be accommodated in T sub-shell.

32
14
8
2

What is the shape of p-orbilal?

Elliptical
Dumb-bell
Spherical
Complex geometrical

Uncertainty principle provide the concept of

an orbital
physical meaning of\(\psi the \psi\)
probability
all the above

Chemistry Class 11 QBank

Chemistry Chapter 2 Mock Test

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