Daily Practice Problems
JEE Chemistry
Structure of Atom
JEE Chemistry
Structure of Atom
Question 1.
The Second emission line in the atomic spectrum of hydrogen is the Balmer series appears at: [Level: Moderate]
(a) 
cm-1
(b) 
cm-1
(c) 
cm-1
(d) 
cm-1
Question 2.
Uncertainty in position of a minute particle of mass 40 g in space is 10-7 m. What is the uncertainty in its velocity (in ms-1) (h = 6.6 × 10-34 Js)
[Level: Moderate]
(a) 3.1 x 10-24
(b) 4.7 x 1024
(c) 1.3 x 10-26
(d) 1.89 x 10-19
Question 3.
The graph is plotted between the probability density Ѱ2(r) as a function of distance ‘r’. this graph represent –[Level: Easy]
(a) 2s
(b) 3p
(c) 3s
(d) 1s
Question 4.
13.6eV is needed for ionization of a hydrogen atom. An electron in a hydrogen atom in its ground state absorbs 2.25 times as much energy as the minimum required for it to escape from the atom. What is the wavelength of the emitted electron? [Level: Difficult]
(me = 9.1 x 10-31kg, e = 1.602 x 10-19C, h = 6.6 x 10-34J.s)
(a) 4.7 x 10-10m
(b) 47 x 10-11m
(c) 9.1 x 10-10m
(d) 2.9 x 10-10m
Question 5.
Last line of Pfund series for H-atom has wavelength λ1A0 and 2nd line of Paschen series has wavelength λ2A0 then – [Level: Difficult]
(a) 
(b) 
(c) 
(d) 
Question 6.
The magnetic momentum of Fe3+ and Cr2+are – [Level: Easy]
(Fe = 26, Cr = 24)
(a) 
(b) 
(c) 
(d) 
Question 6.
The Correct set of quantum number is – [Level: Easy]
(a) 
(b) 
(c) 
(d) 
Question 7.
Calculate the wavelength in A0of the photon that is emitted when an electron in bohr orbit n = 3 returns to the orbit n = 1 in the hydrogen atom. The ionization potential of the ground state of hydrogen atom is -2.17 x 10-11 erg/ atom. [Level: Moderate]
(a) 1030 A0
(b) 103.0 A0
(c) 1.030 A0
(d) 103 A0
Question 8.
The de Broglie wavelength (λ) associated with a photoelectron varies with the frequency (v) of the incident radiation as, [v0 is threshold frequency] : [Level: Moderate]
(a) λ ∝ 
(b) λ ∝ 
(c) λ ∝ 
(d) λ ∝ 
Question 9.
This Schrodinger’s wave equation represents – [Level: Moderate]
Where M = 
(a) 2s
(b) 3d
(c) 4s
(d) 3p
Question 10.
Choose the correct statement.
(a) The lower the value of value of (n+l) for an orbital, the higher is its energy
(b) If two orbitals have same value of (n+l), the orbital with higher value of n
will have lower energy
(c) The energy of a electron in a multi-electron atom depends on quantum
number n only
(d) The energy of an electron in hydrogen atom depends on quantum
number n only [Level: Easy]
Question 11.
What is the angular velocity(ω) of an electron occupying second orbit of Li2+ ion is – [Level: Moderate]
(a) 
K2
(b) 
K2
(c) 
K2
(d) 
K2
Question 12.
The orientation of an atomic orbital is governed by [Level: Easy]
(a) Magnetic quantum number
(b) Principal quantum number
(c) Azimuthal quantum number
(d) Spin quantum number
Question 13.
Select the correct curve(s) – [Level: Easy]
Question 14.
Calculate the total number of nodes in 4d orbital [Level: Moderate]
(a) 3
(b) 4
(c) 1
(d) Zero
Question 15.
Correct graphical representation for the following is/are –[Level: Difficult]
Question 16.
For n = 3, the correct set of l,m are : [Level: Easy]
(a) l = 0, m = 0
(c) l = 3, m = -3,-2,-1,0,1,2,3
(d) l = 1, m = -2,-1,0,1,2
Question 17.
The value of e/m for electron was found to be – [Level: Easy]
(a) 1.75 x 1011 Ckg-1
(b) 1.75 x 108 Cg-1
(c) 1.75 x 105 Cmg-1
(d) All of the above
Question 18.
Given rn+1 - rn-1 = 2rn, where rn ,rn+1 ,rn-1 are Bohr radius for hydrogen atom in nth (n-1)th and (n+1)th shell respectively. Calculate the value of n [Level: Moderate]
Question 19.
A moving electron has 2.5 x 10-18J of kinetic energy. What is the de-broglie wavelength? [Level: Difficult]
(a) 9.8 x 10-28m
(b) 19.8 x 10-12m
(c) 9.8 x 10-28m
(d) 0.98 x 10-28m
Question 20.
Calculate the momentum of a moving particle which has a de Broglie wavelength of 275 pm [Level: Moderate]
(a) 1.24 x 10-24kgms-1
(b) 2.4 x 1024kgms-1
(c) 2.4 x 10-24kgms-1
(d) 2.4 x 10-22kgms-1
**********
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All About Daily Practice Problems on JEE Chemistry Structure of Atom NCERT Chapter 2
Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on JEE Chemistry Structure of Atom NCERT Chapter 2 useful.
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