Nuclei  MCQs

MCQs of Nuclei

Showing 1 to 10 out of 138 Questions
1.
How many protons, neutrons and nucleons respectively is the Pb82206 nucleus up of ?
(a) 82, 206, 288
(b) 206, 82, 288
(c) 82, 124, 206
(d) 124, 82, 206
Answer:

Option (c)

2.
Which of the isotrope, isotone and isobar nuclei respectively of C612 from among C614,B512, N713
(a) C614, N713, B512
(b) B512, C614, N713
(c) N713, B512, C614
(d) C614, B512, N713
Answer:

Option (a)

3.
If the radii of A1327l and Z3064n nuclei are R1 and R2 respectively, thenR1R2=______
(a) 2764
(b) 34
(c) 916
(d) 1330
Answer:

Option (b)

4.
The binding energy per nucleon for deuteron H12 nucleus is 1.1MeV and that for  He24 nucleus is 7 MeV. If teo doteron nuclei fuse to form He24 nucleus, how much energy will be produced ?
(a) 11.8 MeV
(b) 23.6 MeV
(c) 26.9 MeV
(d) 32.4 MeV
Answer:

Option (b)

5.
Which is the necessary and sufficient condition for an element to element to be naturally radioactive?
(a) Z > 50
(b) Z > 60
(c) Z > 70
(d) Z > 83
Answer:

Option (d)

6.
Which one of the following is true for the relative ionizing power of α, β and ϒ ?
(a) It is maximum for α particle
(b) It is maximum for β particle.
(c) It is maximum for ϒ radiation
(d) It is equal for α, β and ϒ 
Answer:

Option (a)

7.
During the life time of a radioactive element as time passes the number of its nuclei decrease and along with that_____
(a) Activity and λ go on decreasing
(b) Activity and λ go on increasing
(c) Activity decrease but λ remains constant
(d) Activity decrease but λ increases
Answer:

Option (c)

8.
Half-life of an radioactive element is 5 min. At the end of 20 min. Its_____% quantity will remain undisintegrated.
(a) 93.73
(b) 75
(c) 25
(d) 6.25
Answer:

Option (d)

9.
After a time interval equal to 3 half-lives; how many times would (a) the activity of a radioactive element be, of its activity? Or (b) mass of a radioactive element be, of its initial mass or (c) number of nuclei of a radioactive element be of its initial number?
(a) 23
(b) 32
(c) 132
(d) 123
Answer:

Option (d)

10.
By the disintegration of the P94u241 , the element which is produced is also radioactive and disintegrates. In such a series total 8 α-particles and 5 β-particles are emitted and then the process stops. Which is the final element produced?
(a) B83i209
(b) P82b209
(c) B83i214
(d) P82b214
Answer:

Option (a)

Showing 1 to 10 out of 138 Questions