Processing math: 100%

The ratio of specific charge of an α-particle to that of a proton is 
(1) 2 : 1                     

(2) 1 : 1

(3) 1 : 2                     

(4) 1 : 3

Subtopic:  Various Atomic Models |
 64%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which of the following have the highest specific charge

(1) Positron                   

(2) Proton

(3) He++                          

(4) None of these

Subtopic:  Various Atomic Models |
 55%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

For the Bohr's first orbit of circumference 2πr, the de-Broglie wavelength of revolving electron will be

(a) 2πr                       (b) πr
(c) 12πr                      (d) 14πr

Subtopic:  Bohr's Model of Atom |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

According to de-Broglie, the de-Broglie wavelength for electron in an orbit of hydrogen atom is 10-10 m. The principle quantum number for this electron is (r=5.13×10-11m)
(a) 1           (b) 2
(c) 3           (d) 4

Subtopic:  Bohr's Model of Atom |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The energy of a photon of light with wavelength 5000 Å is approximately 2.5 eV. This way the energy of an X-ray photon with wavelength 1Å would be 
(1) 2.5/5000 eV             

(2) 2.5/(5000)2 eV

(3) 2.5×5000 eV           

(4)  2.5×(5000)2 eV

Subtopic:  X-Ray (OLD NCERT) |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The graph that correctly represents the relation of frequency v of a particular characteristic X-ray with the atomic number Z of the material is

Subtopic:  X-Ray (OLD NCERT) |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

If in nature there may not be an element for which the principal quantum number n > 4, then the total possible number of elements will be

(1) 60                   

(2) 32

(3) 4                     

(4) 64

Subtopic:  Various Atomic Models |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

In the nth orbit, the energy of an electron is En=13.6n2 eV for the hydrogen atom. What will be the energy required to take the electron from the first orbit to the second orbit?
1. 10.2 eV
2. 12.1 eV
3. 13.6 eV
4. 3.4 eV

Subtopic:  Bohr's Model of Atom |
 81%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The Lyman series of hydrogen spectrum lies in the region

(1) Infrared               

(2) Visible

(3) Ultraviolet             

(4) X- rays

Subtopic:  Spectral Series |
 85%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

Which one of the series of hydrogen spectrum is in the visible region 

1. Lyman series             

2. Balmer series

3. Paschen series           

4. Bracket series

Subtopic:  Spectral Series |
 90%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch