11th Chemistry Weekly Test - 2 ( Quantum Mechanical Model of Atom )

MABS Institution

11th Chemistry Weekly Test - 2 ( Quantum Mechanical Model of Atom )-Aug 2020

Time : 1.30 Hours

Part - A

Generic 2 - Answer All Question

What did Rutherford's alpha ray scattering experiment prove

Define orbital? what are the n and 1 values for 3p_x and 4d_x²_-_y² electron?

The stabilisation of a half filled d - orbital is more pronounced than that of the p-orbital why?

How many radial nodes for 2s, 4p, 5d and 4f orbitals exhibit? How many angular nodes

Consider the following electronic arrangements for the d⁵ configuration.
(a)

\(\upharpoonleft \downharpoonright \) \(\upharpoonleft \downharpoonright \) \(\upharpoonleft \)

(b)

\(\upharpoonleft \) \(\upharpoonleft \) \(\upharpoonleft \) \(\upharpoonleft \downharpoonright \)

(c)

\(\upharpoonleft \) \(\upharpoonleft \) \(\upharpoonleft \) \(\upharpoonleft \) \(\upharpoonleft \)

(i) which of these represents the ground state
(ii) which configuration has the maximum exchange energy.

Give the electronic configuration of Mn²⁺ and Cr³⁺

How many orbitals are possible for n =4?

What is the difference between atomic mass and mass number?

What are the defects of Rutherford's model?

For each of the following, give the sub level designation, the allowable m values and the number of orbitals
(i) n = 4, l=2, (ii) n = 5, l=3 (iii) n = 7, l=0

Part - B

Generic 5 - Answer All Question

Determine the following for the fourth shell of an atom.
(a) The number of subshells
(b) The designation for each subshell
(c) The number of orbitals in each subshell
(d) The maximum number of electrons that can be contained in each subshell

Calculate the product of the uncertainties of displacement and velocity of a moving electron having a mass of 9.1 X 10^-28 g

The uncertainty in the position and velocity of a particle are 1 nm and 5.27 X 10^-24
ms^-1 respectively. Calculate the mass of the particle.
The quantum numbers of six electrons are given below. Arrange them in order of increasing energies.If any of these combination(s) has/have the same energy lists.
(i) n=4, l=2 m₁ = -2,m_s= - \(\frac { 1 }{ 2 } \)
(ii) n= 3, l= 2, m₁=1,m_s = +\(\frac { 1 }{ 2 } \)
(iii) n= 3, l= 1,m₁ =0 m_s= +\(\frac { 1 }{ 2 } \)
(iv) n= 3, l= 2,m₁ = -2,m_s= - \(\frac { 1 }{ 2 } \)
(v) n= 3, l= 1,m₁=-1,,m_s=+ \(\frac { 1 }{ 2 } \)
(vi) n= 4, l= 1,m₁ = 0, m_s= +\(\frac { 1 }{ 2 } \)

The electronic configuration of Cr and Cu are written as 3d⁵ 4s1 and 3d¹0 4s¹ instead 3d⁴ 4s² and 3d⁹ 4s² Justify the statement

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11th Chemistry Weekly Test - 2 ( Quantum Mechanical Model of Atom )

MABS Institution

11th Chemistry Weekly Test - 2 ( Quantum Mechanical Model of Atom )-Aug 2020

Part - A

Generic 2 - Answer All Question

What did Rutherford's alpha ray scattering experiment prove

Define orbital? what are the n and 1 values for 3px and 4dx2-y2 electron?

The stabilisation of a half filled d - orbital is more pronounced than that of the p-orbital why?

How many radial nodes for 2s, 4p, 5d and 4f orbitals exhibit? How many angular nodes

Give the electronic configuration of Mn2+ and Cr3+

How many orbitals are possible for n =4?

What is the difference between atomic mass and mass number?

What are the defects of Rutherford's model?

For each of the following, give the sub level designation, the allowable m values and the number of orbitals (i) n = 4, l=2, (ii) n = 5, l=3 (iii) n = 7, l=0

Part - B

Generic 5 - Answer All Question

Determine the following for the fourth shell of an atom. (a) The number of subshells (b) The designation for each subshell (c) The number of orbitals in each subshell (d) The maximum number of electrons that can be contained in each subshell

Calculate the product of the uncertainties of displacement and velocity of a moving electron having a mass of 9.1 X 10-28 g

The uncertainty in the position and velocity of a particle are 1 nm and 5.27 X 10-24 ms-1 respectively. Calculate the mass of the particle.

The electronic configuration of Cr and Cu are written as 3d5 4s1 and 3d10 4s1 instead 3d4 4s2 and 3d9 4s2 Justify the statement

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Define orbital? what are the n and 1 values for 3p_x and 4d_x²_-_y² electron?

Give the electronic configuration of Mn²⁺ and Cr³⁺

For each of the following, give the sub level designation, the allowable m values and the number of orbitals
(i) n = 4, l=2, (ii) n = 5, l=3 (iii) n = 7, l=0

Determine the following for the fourth shell of an atom.
(a) The number of subshells
(b) The designation for each subshell
(c) The number of orbitals in each subshell
(d) The maximum number of electrons that can be contained in each subshell

Calculate the product of the uncertainties of displacement and velocity of a moving electron having a mass of 9.1 X 10^-28 g

The uncertainty in the position and velocity of a particle are 1 nm and 5.27 X 10^-24
ms^-1 respectively. Calculate the mass of the particle.

The electronic configuration of Cr and Cu are written as 3d⁵ 4s1 and 3d¹0 4s¹ instead 3d⁴ 4s² and 3d⁹ 4s² Justify the statement