Question

Which of the following are correct with respect to the unit of radioactivity?
$\left(i\right)$ The SI unit of radioactivity is curie $\left(Ci\right)$
$\left(ii\right)$ $1$ $Ci=3.7\times {10}^{-10}$ $dis$ $s^{-1}$
$\left(iii\right)$ $1$ $Bq=3.7\times {10}^{-10}Ci$
$\left(iv\right)$ The SI unit of radioactivity is becquerel $\left(Bq\right)$
$\left(v\right)$ $1$ $Ci=3.7\times {10}^{10}Bq$

• A. $\left(i\right)$ and $\left(iii\right)$
• B. $\left(iv\right)$ and $\left(v\right)$
• C. $\left(i\right)$ and $\left(ii\right)$
• D. $\left(ii\right)$ and $\left(iv\right)$
• E. $\left(i\right)$ and $\left(v\right)$

Answer 1

The correct option is B $\left(iv\right)$ and $\left(v\right)$

Radioactivity is expressed in $SI$ units as $Bq$ units.

Also, $1Ci=3.7\times {10}^{10}Bq$