In the electrolytic extraction of $Al$,molten cryolite $(Na_3AlF_6)$ is used because it .......

In the cyanide process for the extraction of silver,sodium cyanide $(NaCN)$ is used to

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ In an Ellingham diagram,the oxidation of carbon to carbon monoxide shows a negative slope with respect to temperature.
Reason $R:$ $CO$ tends to get decomposed at higher temperature.
In the light of the above statements,choose the correct answer from the options given below:

Assertion : Coke and flux are used in smelting.
Reason : The phenomenon in which ore is mixed with suitable flux and coke is heated to fusion is known as smelting.

Which one of the following is used in the extraction of aluminium by the electrolytic process?

Which one of the following electrolytes is used in Down's process for the extraction of sodium metal?