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

MABS Institution

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

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

How many nodes are possible for 2s orbital?

1
2
3
zero

When \(\alpha\)- rays strike a thin gold foil then,

most of the \(\alpha\)- rays do not pass through the gold foil.
most of the \(\alpha\)- rays get deflected back.
most of the \(\alpha\) rays get deflected through small angles.
most of the \(\alpha\)- rays pass through without any deviation.

Bohr's equation for energy of an election in a hydrogen atom is given as______

\(E=\frac { -1312 }{ { n }^{ 2 } } KJ{ mol }^{ -1 }\)
\(E=\frac { -1312 }{ { n }^{ 2 }{ h }^{ 2 } } KJ{ mol }^{ -1 }\)
E = hv
\(E=\frac { 4{ \pi }^{ 2 }{ me }^{ 4 } }{ { n }^{ 2 }{ h }^{ 2 } } KJ{ mol }^{ -1 }\)

The atomic number of an element is 17 and its mass number is 37. The number of protons, electrons and neutrons present in the neutral atom are:

17,37,20
20,17,37
17,17,20
17,20,17
37,20,17.

Which one of the following orbitals is spherical in shape?

When an electron jumps from lower orbit to higher orbit

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

Schrodinger wave equation is applied to determine______.

Probability of finding electron at a given point in space
Wave motion of the electron
Probability density of electron in a given region
All of the above

The fixed circular paths around the nucleus are caused _

orbits
Orbitals
nucleons
Mesons

Which of the following conclusions could not be derived from Rutherford's \(\alpha\)-particle scattering experiment?

Most of the space in the atom is empty.
The radius of the atom is about 10-10 m while that of the nucleus is 10^-15 m
Electrons move in a circular path of fixed energy called orbits.
Nucleus and the electrons are held together by electrostatic force of attraction

Which of the following particle having same kinetic energy, would have the maximum de-Broglie wave length

α-particle
proton
β-particle
neutron

Part - B

Generic 2 - Answer All Question

How fast must a 54g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green light 5400\(\overset { 0 }{ A } \) ?

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

What is the charge and mass of an electron?

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 number of electrons in the following species. H₂ , H₂ , O₂ and O_2^-

An atom of an element contains 35 electrons and 45 neutrons. Deduce
(i) the number of protons
(ii) the electronic configuration for the element
(iii) All the four quantum numbers for the last electron

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 - C

Generic 3 - Answer All Question

An atom of an element contains 29 electrons and 35 neutrons. Deduce
(i) the number of protons.
(ii) the electronic configuration of the element.

The quantum mechanical treatment of the hydrogen atom gives the energy value:
\({ E }_{ n }=\frac { -13.6 }{ { n }_{ 2 } } ev{ \quad atom }^{ -1 }\)
(i) use this expression to find AE between n = 3 and m=4
(ii) Calculate the wavelength corresponding to the above transition.

Write the Schrodinger wave equation

Explain why are Bohr's orbitals are called energy levels?
Which of the following orbitals are possible? 1p, 2s, 2p and 3f.

In Rutherford's experiment, generally thin foil of heavy atoms, like gold, platinum etc. have been used to bombard the a-particles. If the thin foil of light atoms like aluminum is used, what difference would be observed from the above results?

In a chemical reaction, chlorine atom undergoes reduction and aluminium atom undergoes oxidation. Will this redox reaction affect their initial number of protons, neutrons and electrons?

Part - D

Generic 5 - Answer All Question

Calculate the uncertainty in position of a dust particle of mass 0.1 mg if the uncertainty in velocity is \(5\times { 10 }^{ -19 }{ ms }^{ -1 }\)

A beam of helium atoms moves with a velocity of 2.0 \(\times\) 10³ ms^-1 .Find the wavelength of the particles constituting the beam (h=6.626\(\times\)10^-34 Js)

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= +\(\frac { 1 }{ 2 } \)

A neutral atom of an element has 2K, 8L and 5M electrons. Find out the following.
(i) Atomic number of the element (ii) Total number of s-electrons (iii) Total number of p-electrons (iv) Number of protons in the nucleus (v) Valency of the element

What is the de Broglie wavelength (in cm) of a 160g cricket ball travelling at 140 Km hr^-1.

List out the important features of quantum mechanical model of atom

Complete the table given below

S.No Symbol Mass No. Atomic No Proton Neutron Electrons

1. Zn²⁺ 64 30 - - -

2. Cl^- 35 - - 18 18

3. Ar - - 18 22 1

Comment

Add Comment

S.No	Symbol	Mass No.	Atomic No	Proton	Neutron	Electrons
1.	Zn²⁺	64	30	-	-	-
2.	Cl^-	35	-	-	18	18
3.	Ar	-	-	18	22	1

InstaQB

Institutions

12th Standard English Medium

12th Standard Tamil Medium

11th Standard English Medium

11th Standard Tamil Medium

10th Standard English Medium

9th Standard English Medium

8th Standard English Medium

7th Standard English Medium

Class XII

Class XI

12Th Standard

11Th Standard

10Th Standard

9Th Standard

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

MABS Institution

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

Part - A

Multiple Choice Question - Answer All Question

How many nodes are possible for 2s orbital?

When \(\alpha\)- rays strike a thin gold foil then,

Bohr's equation for energy of an election in a hydrogen atom is given as______

The atomic number of an element is 17 and its mass number is 37. The number of protons, electrons and neutrons present in the neutral atom are:

Which one of the following orbitals is spherical in shape?

When an electron jumps from lower orbit to higher orbit

Schrodinger wave equation is applied to determine______.

The fixed circular paths around the nucleus are caused _

Which of the following conclusions could not be derived from Rutherford's \(\alpha\)-particle scattering experiment?

Which of the following particle having same kinetic energy, would have the maximum de-Broglie wave length

Part - B

Generic 2 - Answer All Question

How fast must a 54g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green light 5400\(\overset { 0 }{ A } \) ?

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

What is the charge and mass of an electron?

Give the number of electrons in the following species. H2 , H2 , O2 and O2-

An atom of an element contains 35 electrons and 45 neutrons. Deduce (i) the number of protons (ii) the electronic configuration for the element (iii) All the four quantum numbers for the last electron

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 - C

Generic 3 - Answer All Question

An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons. (ii) the electronic configuration of the element.

The quantum mechanical treatment of the hydrogen atom gives the energy value: \({ E }_{ n }=\frac { -13.6 }{ { n }_{ 2 } } ev{ \quad atom }^{ -1 }\) (i) use this expression to find AE between n = 3 and m=4 (ii) Calculate the wavelength corresponding to the above transition.

Write the Schrodinger wave equation

Explain why are Bohr's orbitals are called energy levels?

Which of the following orbitals are possible? 1p, 2s, 2p and 3f.

In Rutherford's experiment, generally thin foil of heavy atoms, like gold, platinum etc. have been used to bombard the a-particles. If the thin foil of light atoms like aluminum is used, what difference would be observed from the above results?

In a chemical reaction, chlorine atom undergoes reduction and aluminium atom undergoes oxidation. Will this redox reaction affect their initial number of protons, neutrons and electrons?

Part - D

Generic 5 - Answer All Question

Calculate the uncertainty in position of a dust particle of mass 0.1 mg if the uncertainty in velocity is \(5\times { 10 }^{ -19 }{ ms }^{ -1 }\)

A beam of helium atoms moves with a velocity of 2.0 \(\times\) 103 ms-1 .Find the wavelength of the particles constituting the beam (h=6.626\(\times\)10-34 Js)

A neutral atom of an element has 2K, 8L and 5M electrons. Find out the following. (i) Atomic number of the element (ii) Total number of s-electrons (iii) Total number of p-electrons (iv) Number of protons in the nucleus (v) Valency of the element

What is the de Broglie wavelength (in cm) of a 160g cricket ball travelling at 140 Km hr-1.

List out the important features of quantum mechanical model of atom

Complete the table given below S.No Symbol Mass No. Atomic No Proton Neutron Electrons 1. Zn2+ 64 30 - - - 2. Cl- 35 - - 18 18 3. Ar - - 18 22 1

Comment

Other Study material

11th Chemistry Monthly Test - 3 ( Solutions )

11th Chemistry Monthly Test - 4 ( Environmental Ch

11th Chemistry Weekly Test - 2 ( Chemical bonding

11th Chemistry Weekly Test - 1 ( Chemical bonding

11th Chemistry Monthly Test - 4 ( Solutions )

11th Chemistry Weekly Test - 4 ( Physical and Chem

11th Chemistry Monthly Test - 1 ( Physical and Che

11th Chemistry Monthly Test - 2 ( Physical and Che

11th Chemistry Monthly Test - 3 ( Physical and Che

11th Chemistry Monthly Test - 4 ( Physical and Che

11th Chemistry Weekly Test - 1 ( Solutions )

11th Chemistry Weekly Test - 2 ( Solutions )

11th Chemistry Weekly Test - 3 ( Solutions )

11th Chemistry Weekly Test - 4 ( Solutions )

11th Chemistry Monthly Test - 1 ( Solutions )

Tamilnadu Stateboardszs - Class

Give the number of electrons in the following species. H₂ , H₂ , O₂ and O_2^-

An atom of an element contains 35 electrons and 45 neutrons. Deduce
(i) the number of protons
(ii) the electronic configuration for the element
(iii) All the four quantum numbers for the last electron

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

An atom of an element contains 29 electrons and 35 neutrons. Deduce
(i) the number of protons.
(ii) the electronic configuration of the element.

The quantum mechanical treatment of the hydrogen atom gives the energy value:
\({ E }_{ n }=\frac { -13.6 }{ { n }_{ 2 } } ev{ \quad atom }^{ -1 }\)
(i) use this expression to find AE between n = 3 and m=4
(ii) Calculate the wavelength corresponding to the above transition.

A beam of helium atoms moves with a velocity of 2.0 \(\times\) 10³ ms^-1 .Find the wavelength of the particles constituting the beam (h=6.626\(\times\)10^-34 Js)

A neutral atom of an element has 2K, 8L and 5M electrons. Find out the following.
(i) Atomic number of the element (ii) Total number of s-electrons (iii) Total number of p-electrons (iv) Number of protons in the nucleus (v) Valency of the element

What is the de Broglie wavelength (in cm) of a 160g cricket ball travelling at 140 Km hr^-1.

Complete the table given below

S.No Symbol Mass No. Atomic No Proton Neutron Electrons

1. Zn²⁺ 64 30 - - -

2. Cl^- 35 - - 18 18

3. Ar - - 18 22 1