MCQs of Nuclei

Nuclei MCQs

Showing 1 to 10 out of 138 Questions

H o w m a n y p r o t o n s, n e u t r o n s a n d n u c l e o n s r e s p e c t i v e l y i s t h e {}_{82}^{206}{Pb} n u c l e u s u p o f ?

(a)	82, 206, 288
(b)	206, 82, 288
(c)	82, 124, 206
(d)	124, 82, 206

Which of the isotrope, isotone and isobar nuclei respectively of {}_{6}^{12}C from among {}_{6}^{14}C, {}_{5}^{12}B, {}_{7}^{13}N

(a)	${}_{6}^{14}C, {}_{7}^{13}N, {}_{5}^{12}B$
(b)	${}_{5}^{12}B, {}_{6}^{14}C, {}_{7}^{13}N$
(c)	${}_{7}^{13}N, {}_{5}^{12}B, {}_{6}^{14}C$
(d)	${}_{6}^{14}C, {}_{5}^{12}B, {}_{7}^{13}N$

I f t h e r a d i i o f {}_{13}^{27}A l a n d {}_{30}^{64}Z n n u c l e i a r e R_{1} a n d R_{2} r e s p e c t i v e l y, t h e n \frac{R_{1}}{R_{2}} =______

(a)	$\frac{27}{64}$
(b)	$\frac{3}{4}$
(c)	$\frac{9}{16}$
(d)	$\frac{13}{30}$

The binding energy per nucleon for de u t e ron ({}_{1}^{2}H) nucleus is 1.1 MeV and that for {}_{2}^{4}{He} nucleus is 7 MeV . If teo doteron nuclei fuse to form {}_{2}^{4}{He} nucleus, ho w much energy will be produced ?

(a)	11.8 MeV
(b)	23.6 MeV
(c)	26.9 MeV
(d)	32.4 MeV

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

W h i c h o n e o f t h e f o l l o w i n g i s t r u e f o r t h e r e l a t i v e i o n i z i n g p o w e r o f α, β a n d ϒ ?

(a)	It is maximum for α particle
(b)	It is maximum for β particle.
(c)	$I t i s m a x i m u m f o r ϒ r a d i a t i o n$
(d)	$I t i s e q u a l f o r α, β a n d ϒ$

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

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

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)	$2^{3}$
(b)	$3^{2}$
(c)	$\frac{1}{3^{2}}$
(d)	$\frac{1}{2^{3}}$

10.

B y t h e d i \sin t e g r a t i o n o f t h e {}_{94}P u^{241}, t h e e l e m e n t w h i c h i s p r o d u c e d i s a l s o r a d i o a c t i v e a n d d i \sin t e g r a t e s . I n s u c h a s e r i e s t o t a l 8 α - p a r t i c l e s a n d 5 β - p a r t i c l e s a r e e m i t t e d a n d t h e n t h e p r o c e s s s t o p s . W h i c h i s t h e f i n a l e l e m e n t p r o d u c e d ?

(a)	${}_{83}B i^{209}$
(b)	${}_{82}P b^{209}$
(c)	${}_{83}B i^{214}$
(d)	${}_{82}P b^{214}$

Showing 1 to 10 out of 138 Questions