Chemistry 2nd Paper MCQ-Dinajpur Board-2021

1. What is the oxidation number of Mn in $KMnO_{4\ }$ ?

2. $NH_3$ is a base, according to which statement?

i. Arrhenius

ii. Bronsted-Lowry

iii. Lewis

Which one is correct?

3. Which of the following is the functional group of nitrite?

4. $\mathrm{R}-\mathrm{CONH}_{2}+\mathrm{Br}_{2}+\mathrm{KOH} \longrightarrow{ }^{\prime} \mathrm{X}^{\prime}$

(Main Product)
Compound 'X' is-

5. Which gas is freed in cathode during the electrolysis of the aquous solution of edible salt?