Which of the following is the strongest Bronsted base?

Which air pollutant is responsible for the Bhopal gas tragedy?

The period of revolution of planet $A$ around the sun is $8$ times that of planet $B$. The distance of planet $A$ from the sun is how many times greater than that of planet $B$ from the sun?

Cry $II$ Ab and Cry $I$ Ab produce toxins that control:

The sum of the fourth powers of the roots of the equation $x^3+x+1=0$ is

For the reaction $2NO_2 + F_2 \to 2NO_2F$,the following mechanism has been provided:
$NO_2 + F_2 \xrightarrow{slow} NO_2F + F$
$NO_2 + F \xrightarrow{fast} NO_2F$
Thus,the rate expression of the above reaction can be written as: