nuclei Question 33

Question: Q. 6. (i) Write the basic nuclear process involved in the emission of β+in a symbolic form, by a radioactive nucleus.

(ii) In the reactions given below :

(a) ${ }{6}^{11} \mathrm{C} \rightarrow{ }{y}^{z} \mathrm{~B}+x$

(b) ${ }{6}^{12} \mathrm{C}+{ }{6}^{12} \mathrm{C} \rightarrow{ }^{20} \mathrm{Ne}+{ }_{b}^{c} \mathrm{He}$

Find the values of x,y, and z and a,b and c.

A [OD I, II, III 2016]

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Solution:

Ans. (i) Basic nuclear reaction

Multiple \tag

[CBSE Marking Scheme, 2016]

Detailed Answer :

(ii) (a) is β+decay as neutrino is emitted out. 1/2 Hence there is no change in mass number and -1 change in atomic number.

So, y=61=5 and z=11.

(b) is α decay.

Hence there is four unit change in mass number and two unit change in atomic number.

So,

a=122 =10,b=2 and c=4.1/2



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