Identify the major product of following reaction.
$\text{Propene} \xrightarrow[\large{\text{Peroxide}}]{\large{\text{HBr}}} \,?$

Calculate the total volume of simple cubic unit cell in $\text{cm}^3$ if void volume is $2.0 \times 10^{-23}\,\text{cm}^3$

Which of the following statements is true about schottky defect ?

In ionic solid, anions are arranged in hcp array and cations occupy $\dfrac{1}{2}$ tetrahedral voids. What is the formula of ionic compound ?
[Consider A = Cation ; B = anion]