13.Nuclei
medium

બોરોનનો અણુભાર $10.81$ છે અને તેના બે આઇસોટોપ્સ $ _5{B^{10}} $ અને $ _5{B^{11}} $ છે. તો $ _5{B^{10}}{:_5}{B^{11}} $ નો ગુણોત્તર કેટલો હશે?

A

$19 : 81$

B

$10 : 11$

C

$15 : 16$

D

$81 : 19$

(AIPMT-1998)

Solution

(a) Let the percentage of ${B^{10}}$ atoms be $x,$ then Average atomic weight

$ = \frac{{10x + 11(100 – x)}}{{100}} = 10.81$

$ \Rightarrow x = 19\;\;\;\;$

$\therefore \frac{{{N_{{B^{10}}}}}}{{{N_{{B^{11}}}}}} = \frac{{19}}{{81}}$

Standard 12
Physics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.