Chemistry 2nd Paper MCQ-Mymensingh Board-2023

1. Which one is responsible for temporary hardness of water?

2. For SN¹ reaction-

i. order of reactivity-3°>2°>1°> CH$_3$X

ii. occurred in polar solvent

iii. transition state is formed

Which one is correct?

3. Which one acts of both oxidant and reductant?

4. Which one is the possible isomer of compound C$_4$H$_8$O?

5. $\mathrm{ClO}_{3}^{-}+5 \mathrm{Cl}+6 \mathrm{H}^{+} \rightarrow 3 \mathrm{Cl}_{2}+3 \mathrm{H}_{2} \mathrm{O}$. Here, Oxidation occure-