Test: JEE Main 35 Year PYQs- Structure of Atom

Question 1

In a hydrogen atom, if energy of an electron in ground state is 13.6. ev, then that in the 2^nd excited state is [2002]

Accepted Answer

1.51 eV

Answer

3.4 eV

Answer

6.04 eV

Answer

13.6 eV.

Question 2

Uncertainty in position of a minute particle of mass 25 g in space is 10^–5 m. What is the uncertainty in its velocity (in ms^–1) ? (h = 6.6 x 10^-34 Js) [2002]

Accepted Answer

2.1 x 10^–28

Answer

2.1 x 10^–34

Answer

0.5 x 10^–34

Answer

0.5 x 10^–23.

Question 3

The number of d-electrons retained in Fe²⁺ [2003] (At. no. of Fe = 26) ion is

Accepted Answer

6

Answer

4

Answer

5

Answer

3

Question 4

The orbital angular momentum for an electron revolving in an orbit is given by This momentum for an s-electron will be given by [2003]

Accepted Answer

zero

Answer

Answer

Answer

Question 5

Which one of the following groupings represents a collection of isoelectronic species ?(At. nos. : Cs : 55, Br : 35)[2003]

Accepted Answer

N^3–, F^–, Na⁺

Answer

Be, Al3⁺, Cl^–

Answer

Ca²⁺, Cs⁺, Br

Answer

Na⁺, Ca²⁺, Mg²⁺

Question 6

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen [2003]

Planck’s constant, h = 6.63 × 10^–34 Js

Accepted Answer

5 &rarr; 2

Answer

4 &rarr; 1

Answer

2 &rarr; 5

Answer

3 &rarr; 2

Question 7

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately [2003]

Accepted Answer

10^–33 metres

Answer

10^–31 metres

Answer

10^–16metres

Answer

10^–25metres

Question 8

Which of the following sets of quantum numbers is correct for an electron in 4f orbital ? [2004]

Accepted Answer

n = 4, ℓ = 3, m = + 1, s = + ½

Answer

n = 4, ℓ = 4, m = – 4, s = – ½

Answer

n = 4, ℓ = 3, m = + 4, s = + ½

Answer

n = 3, ℓ = 2, m = – 2, s = + ½

Question 9

Consider the ground state of Cr atom (X = 24). The number of electrons with the azimuthal quantum numbers, ℓ = 1 and 2 are, respectively [2004]

Accepted Answer

12 and 5

Answer

16 and 4

Answer

12 and 4

Answer

16 and 5

Question 10

The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097×10⁷ m^–1) [2004]

Accepted Answer

91 nm

Answer

406 nm

Answer

192 nm

Answer

9.1×10^–8nm

Question 11

Which one of the followin g sets of ion s represents the collection of isoelectronic species? [2004]

(Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

Accepted Answer

K⁺, Ca²⁺, Sc³⁺, Cl^–

Answer

K⁺, Cl^–, Mg²⁺, Sc³⁺

Answer

Na⁺, Ca²⁺, Sc³⁺, F^–

Answer

Na⁺, Mg²⁺, Al³⁺, Cl^–

Question 12

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields? [2005]
(A) n = 1, l = 0, m = 0
(B) n = 2, l = 0, m = 0
(C) n = 2, l = 1, m = 1
(D) n = 3, l = 2, m = 1
(E) n = 3, l = 2, m = 0

Accepted Answer

(D) and (E)

Answer

(C) and (D)

Answer

(B) and (C)

Answer

(A) and (B)

Question 13

Of the following sets which one does NOT contain isoelectronic species? [2005]

Accepted Answer

Answer

Answer

Answer

Question 14

According to Bohr's theory, the angular momentum of an electron in 5^th orbit is [2006]

Accepted Answer

2.5 h /&pi;

Answer

10 h /&pi;

Answer

25 h /&pi;

Answer

1.0 h /&pi;

Question 15

Uncertainty in the position of an electron (mass = 9.1 × 10^–31 kg) moving with a velocity 300 ms^–1, accurate upto 0.001% will be [2006]

(h = 6.63 × 10^–34 Js)

Accepted Answer

1.92 × 10^–2 m

Answer

3.84 × 10^–2m

Answer

19.2 × 10^–2m

Answer

5.76 × 10^–2 m

Question 16

Which one of the following sets of ions represents a collection of isoelectronic species? [2006]

Accepted Answer

K⁺, Cl^–, Ca²⁺, Sc³⁺

Answer

N^3–, O^2–, F^–, S^2–

Answer

Li⁺, Na⁺, Mg²⁺, Ca²⁺

Answer

Ba²⁺, Sr²⁺, K⁺, Ca²⁺

Question 17

Which of the following sets of quantum numbers represents the highest energy of an atom? [2007]

Accepted Answer

n = 3, l = 2, m = 1, s = +1/2

Answer

n = 3, l = 0, m = 0, s = +1/2

Answer

n = 3, l = 1, m = 1, s = +1/2

Answer

n = 4, l = 0, m = 0, s = +1/2.

Question 18

Which one of the following constitutes a group of the isoelectronic species? [2008]

Accepted Answer

Answer

Answer

Answer

Question 19

The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol^–1. The energy required to excite the electron in the atom from n = 1 to n = 2 is [2008]

Accepted Answer

9.84 × 10⁵J mol^–1

Answer

8.51 × 10⁵J mol^–1

Answer

6.56 × 10⁵J mol^–1

Answer

7.56 × 10⁵ J mol^–1

Question 20

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 10³ ms^–1. (Mass of proton = 1.67 × 10^–27kg and h = 6.63 × 10^–34 Js)

Accepted Answer

0.40 nm

Answer

2.5 nm [2009]

Answer

14.0 nm

Answer

0.32 nm

Question 21

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is ( h = 6.6 × 10^–34 kg m²s^–1, mass of electron, em = 9.1 × 10^–31 kg) : [2009]

Accepted Answer

1.92 × 10^–3m

Answer

5.10 × 10^–3 m

Answer

3.84 ×10^–3 m

Answer

1.52 × 10^–4 m

Question 22

The energy required to break one mole of Cl – Cl bonds in Cl2 is 242 kJ mol^–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 × 10⁸ ms^–1 and NA = 6.02 × 10²³ mol^–1). [2010]

Accepted Answer

494 nm

Answer

594 nm

Answer

640 nm

Answer

700 nm

Question 23

Ionisation energy of He⁺ is 19.6 × 10^–18J atom^–1. The energy of the first stationary state (n = 1) of Li²⁺ is [2010]

Accepted Answer

–4.41 × 10^–17 J atom^–1

Answer

4.41 × 10^–16 J atom^–1

Answer

–2.2 × 10^–15 J atom^–1

Answer

8.82 × 10^–17J atom^–1

Question 24

A gas a bsor bs a ph oton of 355 n m an d emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:[2011]

Accepted Answer

743 nm

Answer

1035 nm

Answer

325 nm

Answer

518 nm

Question 25

The electrons identified by quantum numbers n and l :
(A) n = 4, l = 1
(B) n = 4, l = 0
(C) n = 3, l = 2
(D) n = 3, l = 1
can be placed in order of increasing energy as : [2012]

Accepted Answer

(D) < (B) < (C) < (A)

Answer

(C) < (D) < (B) < (A)

Answer

(B) < (D) < (A) < (C)

Answer

(A) < (C) < (B) < (D)

Question 26

Energy of an electron is given by E = – 2.178 ×

Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be : (h = 6.62 × 10 ^–34 Js and c = 3.0 × 10⁸ ms^–1) [JEE M 2013]

Accepted Answer

1.214 × 10^–7m

Answer

2.816 × 10.^–7m

Answer

6.500 × 10^–7 m

Answer

8.500 × 10^–7 m

Question 27

The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is: [JEE M 2014]

Accepted Answer

Answer

Answer

Answer

Question 28

Which of the following is the energy of a possible excited state of hydrogen ? [JEE M 2015]

Accepted Answer

&ndash;3.4 eV

Answer

+6.8 eV

Answer

+13.6 eV

Answer

&ndash;6.8 eV

Question 29

A stream of electrons from a heated filaments was passed two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h/λ (where λ is wavelength associated with electron wave) is given by: [JEE M 2016]

Accepted Answer

Answer

Answer

meV

Answer

2meV

JEE Main 35 Year PYQs- Structure of Atom - Free MCQ Test with solutions

MCQ Practice Test & Solutions: Test: JEE Main 35 Year PYQs- Structure of Atom (29 Questions)

In a hydrogen atom, if energy of an electron in ground state is 13.6. ev, then that in the 2^nd excited state is [2002]

Uncertainty in position of a minute particle of mass 25 g in space is 10^–5 m. What is the uncertainty in its velocity (in ms^–1) ? (h = 6.6 x 10^-34 Js) [2002]

The number of d-electrons retained in Fe²⁺ [2003] (At. no. of Fe = 26) ion is

The orbital angular momentum for an electron revolving in an orbit is given by This momentum for an s-electron will be given by [2003]

Which one of the following groupings represents a collection of isoelectronic species ?(At. nos. : Cs : 55, Br : 35)[2003]

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen [2003]
Planck’s constant, h = 6.63 × 10^–34 Js

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately [2003]

Which of the following sets of quantum numbers is correct for an electron in 4f orbital ? [2004]

Consider the ground state of Cr atom (X = 24). The number of electrons with the azimuthal quantum numbers, ℓ = 1 and 2 are, respectively [2004]

The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097×10⁷ m^–1) [2004]

Which one of the followin g sets of ion s represents the collection of isoelectronic species? [2004]
(Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields? [2005]
(A) n = 1, l = 0, m = 0
(B) n = 2, l = 0, m = 0
(C) n = 2, l = 1, m = 1
(D) n = 3, l = 2, m = 1
(E) n = 3, l = 2, m = 0

Of the following sets which one does NOT contain isoelectronic species? [2005]

According to Bohr's theory, the angular momentum of an electron in 5^th orbit is [2006]

Uncertainty in the position of an electron (mass = 9.1 × 10^–31 kg) moving with a velocity 300 ms^–1, accurate upto 0.001% will be [2006]
(h = 6.63 × 10^–34 Js)

Which one of the following sets of ions represents a collection of isoelectronic species? [2006]

Which of the following sets of quantum numbers represents the highest energy of an atom? [2007]

Which one of the following constitutes a group of the isoelectronic species? [2008]

The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol^–1. The energy required to excite the electron in the atom from n = 1 to n = 2 is [2008]

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 10³ ms^–1. (Mass of proton = 1.67 × 10^–27kg and h = 6.63 × 10^–34 Js)

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is ( h = 6.6 × 10^–34 kg m²s^–1, mass of electron, em = 9.1 × 10^–31 kg) : [2009]

The energy required to break one mole of Cl – Cl bonds in Cl2 is 242 kJ mol^–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 × 10⁸ ms^–1 and NA = 6.02 × 10²³ mol^–1). [2010]

Ionisation energy of He⁺ is 19.6 × 10^–18J atom^–1. The energy of the first stationary state (n = 1) of Li²⁺ is [2010]

A gas a bsor bs a ph oton of 355 n m an d emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:[2011]

The electrons identified by quantum numbers n and l :
(A) n = 4, l = 1
(B) n = 4, l = 0
(C) n = 3, l = 2
(D) n = 3, l = 1
can be placed in order of increasing energy as : [2012]

Energy of an electron is given by E = – 2.178 ×
Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be : (h = 6.62 × 10 ^–34 Js and c = 3.0 × 10⁸ ms^–1) [JEE M 2013]

The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is: [JEE M 2014]

Which of the following is the energy of a possible excited state of hydrogen ? [JEE M 2015]

A stream of electrons from a heated filaments was passed two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h/λ (where λ is wavelength associated with electron wave) is given by: [JEE M 2016]

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JEE Main 35 Year PYQs- Structure of Atom - Free MCQ Test with solutions

MCQ Practice Test & Solutions: Test: JEE Main 35 Year PYQs- Structure of Atom (29 Questions)

In a hydrogen atom, if energy of an electron in ground state is 13.6. ev, then that in the 2nd excited state is [2002]

Uncertainty in position of a minute particle of mass 25 g in space is 10–5 m. What is the uncertainty in its velocity (in ms–1) ? (h = 6.6 x 10-34 Js) [2002]

The number of d-electrons retained in Fe2+ [2003] (At. no. of Fe = 26) ion is

The orbital angular momentum for an electron revolving in an orbit is given by This momentum for an s-electron will be given by [2003]

Which one of the following groupings represents a collection of isoelectronic species ?(At. nos. : Cs : 55, Br : 35)[2003]

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen [2003]Planck’s constant, h = 6.63 × 10–34 Js

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately [2003]

Which of the following sets of quantum numbers is correct for an electron in 4f orbital ? [2004]

Consider the ground state of Cr atom (X = 24). The number of electrons with the azimuthal quantum numbers, ℓ = 1 and 2 are, respectively [2004]

The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097×107 m–1) [2004]

Which one of the followin g sets of ion s represents the collection of isoelectronic species? [2004](Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields? [2005] (A) n = 1, l = 0, m = 0 (B) n = 2, l = 0, m = 0 (C) n = 2, l = 1, m = 1 (D) n = 3, l = 2, m = 1 (E) n = 3, l = 2, m = 0

Of the following sets which one does NOT contain isoelectronic species? [2005]

According to Bohr's theory, the angular momentum of an electron in 5th orbit is [2006]

Uncertainty in the position of an electron (mass = 9.1 × 10–31 kg) moving with a velocity 300 ms–1, accurate upto 0.001% will be [2006](h = 6.63 × 10–34 Js)

Which one of the following sets of ions represents a collection of isoelectronic species? [2006]

Which of the following sets of quantum numbers represents the highest energy of an atom? [2007]

Which one of the following constitutes a group of the isoelectronic species? [2008]

The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol–1. The energy required to excite the electron in the atom from n = 1 to n = 2 is [2008]

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 103 ms –1. (Mass of proton = 1.67 × 10–27 kg and h = 6.63 × 10–34 Js)

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is ( h = 6.6 × 10–34 kg m2s–1, mass of electron, em = 9.1 × 10–31 kg) : [2009]

The energy required to break one mole of Cl – Cl bonds in Cl2 is 242 kJ mol–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 × 108 ms–1 and NA = 6.02 × 1023 mol–1). [2010]

Ionisation energy of He+ is 19.6 × 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is [2010]

A gas a bsor bs a ph oton of 355 n m an d emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:[2011]

The electrons identified by quantum numbers n and l : (A) n = 4, l = 1 (B) n = 4, l = 0 (C) n = 3, l = 2 (D) n = 3, l = 1 can be placed in order of increasing energy as : [2012]

Energy of an electron is given by E = – 2.178 × Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be : (h = 6.62 × 10 –34 Js and c = 3.0 × 108 ms–1) [JEE M 2013]

The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is: [JEE M 2014]

Which of the following is the energy of a possible excited state of hydrogen ? [JEE M 2015]

A stream of electrons from a heated filaments was passed two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h/λ (where λ is wavelength associated with electron wave) is given by: [JEE M 2016]

Chapter-wise Tests for JEE Main & Advanced

Chapter-wise Tests for JEE Main & Advanced

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About this JEE Practice Test

Explore more JEE Study Resources

In a hydrogen atom, if energy of an electron in ground state is 13.6. ev, then that in the 2^nd excited state is [2002]

Uncertainty in position of a minute particle of mass 25 g in space is 10^–5 m. What is the uncertainty in its velocity (in ms^–1) ? (h = 6.6 x 10^-34 Js) [2002]

The number of d-electrons retained in Fe²⁺ [2003] (At. no. of Fe = 26) ion is

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen [2003]
Planck’s constant, h = 6.63 × 10^–34 Js

The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097×10⁷ m^–1) [2004]

Which one of the followin g sets of ion s represents the collection of isoelectronic species? [2004]
(Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields? [2005]
(A) n = 1, l = 0, m = 0
(B) n = 2, l = 0, m = 0
(C) n = 2, l = 1, m = 1
(D) n = 3, l = 2, m = 1
(E) n = 3, l = 2, m = 0

According to Bohr's theory, the angular momentum of an electron in 5^th orbit is [2006]

Uncertainty in the position of an electron (mass = 9.1 × 10^–31 kg) moving with a velocity 300 ms^–1, accurate upto 0.001% will be [2006]
(h = 6.63 × 10^–34 Js)

The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol^–1. The energy required to excite the electron in the atom from n = 1 to n = 2 is [2008]

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 10³ ms^–1. (Mass of proton = 1.67 × 10^–27kg and h = 6.63 × 10^–34 Js)

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is ( h = 6.6 × 10^–34 kg m²s^–1, mass of electron, em = 9.1 × 10^–31 kg) : [2009]

The energy required to break one mole of Cl – Cl bonds in Cl2 is 242 kJ mol^–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 × 10⁸ ms^–1 and NA = 6.02 × 10²³ mol^–1). [2010]

Ionisation energy of He⁺ is 19.6 × 10^–18J atom^–1. The energy of the first stationary state (n = 1) of Li²⁺ is [2010]

The electrons identified by quantum numbers n and l :
(A) n = 4, l = 1
(B) n = 4, l = 0
(C) n = 3, l = 2
(D) n = 3, l = 1
can be placed in order of increasing energy as : [2012]

Energy of an electron is given by E = – 2.178 ×
Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be : (h = 6.62 × 10 ^–34 Js and c = 3.0 × 10⁸ ms^–1) [JEE M 2013]