An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

Select the correct statement from the following.

In the conversion of a zinc ore to zinc metal,the process of roasting involves:

The bob of a simple pendulum is hanging vertically down from a fixed identical bob by means of a string of length $l$. If both bobs are charged with a charge $q$ each,what is the time period of the pendulum? (Ignore the radii of the bobs.)

Two blocks of masses $1 \ kg$ and $2 \ kg$ are connected by a metal wire going over a smooth pulley. The breaking stress of the metal is $\frac{40}{3 \pi} \times 10^6 \ N m^{-2}$. What should be the minimum radius of the wire used if it should not break (in $mm$)? $\left(g = 10 \ m s^{-2}\right)$

Hydrolysis of $NCl_3$ gives $NH_3$ and $X$. Which of the following is $X$?