InstaQB

Home
Institutions
- Institutions
  
  Polytechnic Colleges
  
  Medical Colleges
  
  Arts & Science Colleges
  
  Universities
  
  Engineering Colleges
  
  Agricultural Colleges
  
  Research Institute
  
  Law Colleges
  
  Audiology and Speech Colleges
  
  Business & Management colleges
  
  Nursing colleges
  
  Hotel Management institutes
  
  Aeronautical Colleges
  
  Bachelor's Degree
Syllabus
Courses
Stateboard
- 12th Standard English Medium
  
  Maths
  
  Physics
  
  Chemistry
  
  Biology
  
  Computer Science
  
  Business Maths
  
  Economics
  
  Commerce
  
  Accountancy
  
  History
  
  Computer Applications
  
  Computer Technology
  12th Standard Tamil Medium
  
  உயிரியல்
  
  கணினி பயன்பாடுகள்
  
  கணினி அறிவியல்
  
  வணிகக் கணிதம்
  
  வணிகவியல்
  
  பொருளியல்
  
  கணிதவியல்
  
  வேதியியல்
  
  இயற்பியல்
  
  கணினி தொழில்நுட்பம்
  
  வரலாறு
  
  கணக்குப்பதிவியல்
  11th Standard English Medium
  
  Maths
  
  Commerce
  
  Economics
  
  Biology
  
  Business Maths
  
  Accountancy
  
  Computer Science
  
  Physics
  
  Chemistry
  
  Computer Applications
  
  History
  
  Computer Technology
  
  Bio - Zoology
  11th Standard Tamil Medium
  
  கணிதவியல்
  
  உயிரியல்
  
  பொருளியல்
  
  இயற்பியல்
  
  வேதியியல்
  
  வணிகக் கணிதம்
  
  கணினி அறிவியல்
  
  கணக்குப்பதிவியல்
  
  வணிகவியல்
  
  கணினி பயன்பாடுகள்
  10th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  
  9th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  
  8th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  7th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
ICSE/ISC
- Class XII
  
  Mathematics
  
  Physics
  
  Accountancy
  
  Biology
  
  History
  
  Geography
  
  Psychology
  
  chemistry
  
  Economics
  
  Computer Science
  
  Political Science
  
  Business Studies
  Class XI
  
  Accountancy
  
  Chemistry
  
  Mathematics
  
  Biology
  
  Geography
  
  Physics
  
  History
CBSE
- 12Th Standard
  
  Physics
  
  Chemistry
  
  Maths
  
  Biology
  
  History
  
  Economics
  
  Commerce
  
  Geography
  
  Socialogy
  
  Business Studies
  
  Computer Science
  
  Biotechnology Class
  
  Political Science
  
  Home Science
  11Th Standard
  
  Physics
  
  Chemistry
  
  Maths
  
  Biology
  
  History
  
  Economics
  
  Commerce
  
  Socialogy
  
  Business Studies
  
  Geography
  
  Home Science
  
  Computer Science
  
  Biotechnology Class
  
  Political Science
  10Th Standard
  
  Physics
  
  Chemistry
  
  Biology
  
  Mathematics
  
  Economics
  
  Geography
  
  History & Civics
  
  Computer Application
  9Th Standard
  
  Physics
  
  Chemistry
  
  Biology
  
  mathematics
  
  Computer Application
  
  Economics
  
  Geography
  
  History & Civics

11th Chemistry Weekly Test - 3 ( Quantum Mechanical Model of Atom )

MABS Institution

11th Chemistry Weekly Test - 3 ( Quantum Mechanical Model of Atom )-Aug 2020

Time : 1.00 Hours

Part - A

Multiple Choice Question - Answer All Question

The electronic configuration of Eu (Atomic no. 63) Gd (Atomic no. 64) and Tb (Atomic no. 65) are

[Xe] 4f⁶ 5d^' 6s², [Xe] 4f⁷ Sd¹ 6s² and [Xe] 4f⁸5d¹ 6s²
[Xe] 4f⁷ , 6s², [Xe] 4f⁷ 5d¹ 6s² and [Xe] 4f⁹ 6s²
[Xe] 4f⁷ ,6s², [Xe] 4f⁷ 6s² and [Xe] 4f⁷ 5d¹ 6s²
[Xe] 4f⁶Sd¹ 6s², [Xe] 4f⁷ 5d¹ 6s² and [Xe] 4f⁹ 6s²

Electron density in the yz plane of 3d_x_^y_-_y² orbital is

zero
0.50
0.75
0.90

If uncertainty in position and momentum are equal, then minimum uncertainty in velocity is

\(\frac { 1 }{ m } \sqrt { \frac { h }{ \pi } } \)
\( \sqrt { \frac { h }{ \pi } } \)
\(\frac { 1 }{ 2m } \sqrt { \frac { h }{ \pi } } \)
\( { \frac { h }{4\pi } } \)

The number of neutron(s) present in deuterium is

0
1
2
3

The wavelength associated with an electron moving with velocity 10¹⁰ ms^-1 is

6.62 \(\times\) 10^-10m
7.28 \(\times\) 10^-14m
3.69 \(\times\) 10^-12m
4.92 \(\times\) 10^-11m

In multi-electron atom,4s-orbital is lower in energy than

3d-orbital
3p-orbital
2s-orbital
2p-orbital

de-Broglie equation is

λ = mv/h
λ = hmv
λ = hv/m
λ =h/mv

Match the quantum numbers with the information provided by these.

Quantum number Information Provided

A Principal quantum number 1 orientation of the orbital

B Azimuthal quantum number 2 energy and size of orbital

C Magnetic quantum number 3 spin of electron

D Spin quantum number 4 shape of the orbital

A B C D

1 2 3 4
A B C D

2 4 1 3
A B C D

3 2 4 1
A B C D

4 3 2 1

Using s, p, d, f notations, describe the orbital with the following quantum numbers n = 2, I = 1.

2s
1s
2p
1p

The total number of orbitals associated with the principal quantum number n = 3 is

9
8
5
7

Almost the entire mass of an atom is concentrated in the ----

proton
electrons
neutrons
nucleus

Consider the following statements and pick the incorrect statement(s).
1.Schrodinger wave equation is used to determine the probability of finding a electron at a given point in space.
2.The energy of a electron at infinity is positive
3.Angular momentum quantum number gives information regarding subshells.

1&3
only 1
only 2
1,2 & 3

Orientation of orbitals is given by

Magnetic quantum number
Spin quantum number
Azimuthal quantum number
Principal quantum number

The effect which represents the splitting of spectral lines by external electric field is______

Stark effect
Zeeman effect
Raman effect
None of these

How many neutrons and protons respectively are present in the ₆C¹³ nuclei?

6, 13
6, 7
13,6
7,6

According to Bohr's theory angular momentum of an electron in 6^th orbit is

\(2.5\frac { h }{ \pi } \)
\(6\frac { h }{ \pi } \)
\(3\frac { h }{ \pi } \)
\(\frac { 2.5h }{ 2\pi } \)

Consider the following statements
1.\(\lambda\) .= h / mv is valid only when the particle travels at speed much less than the speed of light.
2. Einstein's mass-energy relationship is E=mc²
3. The angular momentum (mvr) ofthe electron must be equal to an integral multiple of h/4\(\pi\) . Which of the following statementts) given above is/ are correct?

1&3
Only 1
1 & 2
1, 2 & 3

If E_n = -313.6/n2,If the value of E_i = -34.84 to which value 'n' corresponds

4
3
2
1

The energies E₁and E₂ of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ie \(\lambda \)₁ and\(\lambda \)₂ will be

\(\frac { { \lambda }_{ 1 } }{ { \lambda }_{ 2 } } =1\)
\({ \lambda }_{ 1 }=2{ \lambda }_{ 2 }\)
\({ \lambda }_{ 1 }=\sqrt { 25\times 50{ \lambda }_{ 2 } } \)
\(2{ \lambda }_{ 1 }={ \lambda }_{ 2 }\)

Which of the following properties of atom could be explained correctly by Thomson model of an atom?

Overall neutrality of atom.
Spectra of hydrogen atom.
Position of protons, electrons and neutrons in atom .
Stability of atom.

What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10ms^-1?

6.62 \(\times\) 10^-34m
6.626 \(\times\) 10³⁴m
6.626 \(\times\) 10^-34m
6.626 \(\times\) 10³⁴m

What is the maximum number of orbitals that can be identified with the following quantum numbers? n=3,l=1,m₁=0

1
2
3
4

Name the element whose isotope has mass number 14 and 8 neutrons.

Carbon
Nitrogen
Oxygen
Fluorine

Which of the following configuration is correct for iron?

1s²2s²2p⁶3s²3p⁶4s²3d⁷
1s²2s²2p⁶3s²3p⁶4s²3d⁵
1s²2s²2p⁶3s²3p⁶3d⁵
1s²2s²2p⁶3s²3p⁶4s²3d⁶

Splitting of spectral lines in an electric field is called

Zeeman effect
Shielding effect
Compton effect
Stark effect

Time independent Schnodinger wave equation is

\(\overset { \wedge }{ H } \psi =E\psi \)
\({ \triangledown }^{ 2 }\psi +\frac { 8{ \pi }^{ 2 }m }{ { h }^{ 2 } } (E+V)\psi =0\)
\(\frac { { \partial }^{ 2 }\psi }{ { \partial x }^{ 2 } } +\frac { { \partial }^{ 2 }\psi }{ { \partial y }^{ 2 } } +\frac { { \partial }^{ 2 }\psi }{ { \partial z }^{ 2 } } +\frac { { 2m } }{ { h }^{ 2 } } (E-V)\Psi =0\)
All of these

J. J. Thomson's cathode ray experiment revealed that atoms consist of

electrons
protons
neutrons
photons

The energy of electron in an atom is given by En =

\(\frac { 4{ \pi }^{ 2 }{ me }^{ 4 } }{ { n }^{ 2 }h^{ 2 } } \)
\(\frac { 2{ \pi }^{ 2 }{ me }^{ 4 } }{ { n }^{ 2 }h^{ 2 } } \)
\(\frac { 2{ \pi }^{ 2 }{ me }^{ 4 } }{ { n }^{ 2 }h^{ 2 } } \)
\(\frac { 2{ \pi }{ me }^{ 4 } }{ { n }^{ 2 }h^{ 2 } } \)

Which of the following has maximum number of unpaired d-electrons?

N³⁺
Fe²⁺
Zn⁺
Cu⁺

The charge to mass ratio of electron was found to be

(a) 1.6022 x 10-¹⁹C kg^-1
(b) 1.925 x 10¹²C kg^-I
1.758 x 10¹¹C kg^-1
1.869 x 10¹³C kg^-1

Match species given in List-I with the electronic configuration of list-II.

List-I List-II

A Cr 1 [Ar]3d⁸4s⁰

B Fe²⁺ 2 [Ar]3d¹⁰4s¹

C Ni²⁺ 3 [Ar]3d⁶4s⁰

D Cu 4 [Ar]3d⁶4s¹

A B C D

3 4 2 1
A B C D

4 3 2 1
A B C D

4 3 1 2
A B C D

3 4 1 2

When an electron jumps from lower orbit to higher orbit

energy is released
energy is absorbed
no change in energy
it radiates energy

Two electrons occupying the same orbital are distinguished by

azimuthal quantum number
spin quantum number
magnetic quantum number
orbital quantum number

Who modified Bohr's theory by introducing elliptical orbits for electrons path?

Rutherford
Thomson
Hund
Sommerfeld

Match the list I with List II and select the correct answer using the code given below the list

List I List II

A p orbital 1 Clover leaf

B s orbital 2 Dumb bell with doughnut

C dz² 3 Dumb bell

D d_xy 4 Spherical

A B C D

1 3 2 4
A B C D

4 3 1 2
A B C D

3 4 2 1
A B C D

2 1 4 3

Comment

Add Comment

Tamilnadu Stateboardszs - Class