Chemistry 2nd Paper MCQ-Barishal Board-2021

1. What is the r.m.s velocity of $O_2$ gas st 27°C temperature?

2. Which of the following compounds gives nucleophilic addition reaction?

3. $\mathrm{Fe}^{2+}+\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{H}^{+} \rightarrow{ }^{\prime} \mathrm{A}^{\prime}+\mathrm{Cr}^{3}+\mathrm{H}_{2} \mathrm{O}$
How many mL of decimolar reducing solution will be required to reduce 10 mL 0.05M oxidant solution of the stem?

4. What will be the kinetic energy of 14g of $N_2$ gas at 25°C temperature?

5. $\begin{array}{l}5 \mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}+2 \mathrm{KMnO}_{4}+3 \mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow 10 \mathrm{CO}_{2}+ \\ 2 \mathrm{MnSO}_{4}+8 \mathrm{H}_{2} \mathrm{O}+\mathrm{K}_{2} \mathrm{SO}_{4}\end{array}$
How much mole of electrons are exchanged in reaction given in the stem?