is Y =Helium?
For a radioactive decay reacn. :
X > Y + q a ( where q is the no. of stoichiometric coefficient )
Following graph was observed :
http://img849.imageshack.us/i/62431305.png/
If the ratio of the volume of the emitted helium gas at different time t1 and t2 be 1/2 . Find the value of q.

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12 Answers
:)
dhyaan se padho quesn ko..........
actually woh a ki jagah alpha hai
sorry for that...
:P
LOL!....this time i must say for first time in life i was NOT DUMB...i really felt the questuion needed more to decide :P[3]
now let me try my hands on it!
wow this turned out to be pretty interesting
but too long see i will give u the final equations try to sole them and hopefully that would yield required answer
equation(i)k*(t2t1)=ln[(1y)/(1x)]
eqution(ii)y/x=2
equation(iii)k*a*qk*V=dV/dt.......limits of integration are for V from qax to qay and for time from t1 to t2!
this would yield the answer as far as i think!
wud u like to xplain a little plzz??
ans baad ki baat hai
thoda samjha to de yaar!!
natural method use kiya maine when nothing works we start from first principles
take initial concentration a and do all the lengthy mole concept wala jhamela at t1 and t2 then write it in terms of the equations u will get similar equations (if i did not do any mistake)! or may be even if u get different equations u might have assumed something different...but assumption is assumption and it is bound to get cancelled [3]so no worries!
:D
ok i did it this way
X > Y + q \alpha
at t_{1} ax x qx
at t_{2} ay y qy
at t1 , ax = qx
x = (a+1)/2
similarly at t2 y = a/2
vol. of gas is directly proportional to no. of moles of gas
so i found qx / qy
so x/y = 2/q+1
and hence q = 3
hope i m correct
:)
@akhil
forgot this thread???justify those conclusions u made!like
at t1 , ax = qx how?