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Q.

Statement   1;  Ka  x-rays  are  produced  when  an  electron  makes  a   transition from  the   k –shell to the L-shell.
Statement 11;   The   frequency  of Ka x-rays  is  greater  than that  of  Kβ x-rays 

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a

statement    1  is   true  but  statement 11 is  false

b

statement  1 and  statement 11 are  false  

c

statement 1  and  statement  11  are true  and the statement 11  is the  correct explanation  of  statement  1

d

statement  1 and 11  and  statement 11 are  true  but the statement 11 is  not  the  correct  explanation  of  statement  1

answer is D.

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Detailed Solution

 Kα x-rays are produced when an electron makes a transition  from the L- shell to the K shell. Also, the frequency of Kα x-rays is smaller than that  of  Kβ x-rays 

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