Chemistry 2nd Paper CQ-Chittagong Board-2019

What is called secondary electric cell?

Why does $\mathrm{H}_{2} \mathrm{O}_{2}$ act both as an oxidizing agent and a reducing agent?

Balanced the oxidation-reduction reaction with half cell reaction which occur in vessel-C by passing $\mathrm{H}_{2} \mathrm{~S}$ gas.

If the solution of half of the volume of vessel-A reacts with the solution of total volume of vessel-B whether the blue vitriol sample is pure - Analyze mathematically.

What is called nano particle?

Paper recycling plays role for the safe environment- Explain.

Describe the principle of second industrial product in the stem.

Analyze your opinion for prevention of environment pollution in expanding of the first industry in the stem.

What is called plasticity?

Why methylamine is strong base than phenylamine? Explain.

Explain the stereo isomerism of compound 'B'.

Determine the order ' $C$ ', 'D' and ' $E$ ' by analyzing the reactivity in nucleophilic addition reaction.

What is standard electrode potential?

Why does the current of the electronic conductance decrease with increasing temperature?

Determine the electromotive force of the cell in the stem.

The solution of $\mathrm{B}^{3+}$ ion whether can be stored in zinc vessel - Explain mathematically.

What is called disproportionation reaction?

Molar solution is temperature dependent -2 Explain.

Determine the concentration of the solution of vessel-M of the stem in ppm.

Is it possible or not the mixed solution of vessel- $(K+L)$ can be neutralised by the solution of vessel-M - Analyze.