Solved papers for JEE Main & Advanced AIEEE Solved Paper-2003

done AIEEE Solved Paper-2003 Total Questions - 3

• question_answer1) A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 min, the rate is 1250 disintegrations per minute. Then, the decay constant (per minute) is     AIEEE  Solved  Paper-2003
  A)
  \[0.4\,ln\,2\]         
  done clear
  B)
        \[0.2\,\ln \,2\]                  
  done clear
  C)
        \[0.1\,\ln \,2\]                  
  done clear
  D)
        \[0.8\,\ln \,2\]
  done clear
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• question_answer2) A nucleus with \[Z=92\] emits the following in a sequence: \[\alpha ,\alpha ,{{\beta }^{-}},{{\beta }^{-}},\alpha ,\alpha ,\alpha ,\alpha ;{{\beta }^{-}},{{\beta }^{-}},\alpha ,{{\beta }^{+}},{{\beta }^{+}},\alpha \]. The Z of the resulting nucleus is     AIEEE  Solved  Paper-2003
  A)
  76          
  done clear
  B)
        78       
  done clear
  C)
        82          
  done clear
  D)
        74
  done clear
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• question_answer3) In the nuclear fusion reaction,                 \[_{1}^{2}H+_{1}^{3}H\to _{2}^{4}He+n\] given that the repulsive potential energy between the two nuclei is \[7.7\times {{10}^{-14}}\] J the temperature at which the gases must be heated to initiate the reaction is nearly [Boltzmann's constant \[k=1.38\times {{10}^{-23}}J/K\]]     AIEEE  Solved  Paper-2003
  A)
                          \[{{10}^{7}}\] K  
  done clear
  B)
                        \[{{10}^{5}}\] K                                
  done clear
  C)
  \[{{10}^{3}}\] K                                
  done clear
  D)
  \[{{10}^{9}}\] K
  done clear
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