Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

done JEE Main Paper (Held On 11 April 2015) Total Questions - 1

• question_answer1) Let \[{{N}_{\beta }}\] be the number of \[\beta \] particles emitted by 1 gram of \[N{{a}^{24}}\] radioactive nuclei (half-life = 15 hrs) in 7.5 hours, \[{{N}_{\beta }}\] is close to (Avogadro number \[=6.023\times {{10}^{23}}/g.\]mole) : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[6.2\times {{10}^{21}}\]
  done clear
  B)
  \[7.5\times {{10}^{21}}\]
  done clear
  C)
  \[1.25\times {{10}^{22}}\]
  done clear
  D)
  \[1.75\times {{10}^{22}}\]
  done clear
  View Answer play_arrow