In the electrolytic extraction of aluminium, cryolite is used
To obtain more aluminium
To decrease temperature to dissolve bauxite
To protect the anode
As reducing agent
Which metal burn in air at high temperature with the evolution of much heat
Three pairs of compounds are given below. Identify that compound in each of the pairs which has group $-13$ element in more stable oxidation state. Give reason for your choice. State the nature of bonding also. $(A)$ $TlCl_3, TlCl$ $(B)$ $AlCl, AlCl$ $(C)$ $InCl_3, InCl$
The correct formula of borax is
When $AlCl_3·6H_2O$ is strongly heated, then it forms
Which of the following is not true about potash alum