A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is
|
The outer electron configuration of Gd (Atomic number: 64) is: |
Answer |
|
Anhydrous ferric chloride is prepared by |
Answer |
|
Identify the ore not containing iron |
Answer |
|
Heating mixture of Cu2O and Cu2S will give |
Answer |
|
KMnO4 can be prepared from K2MnO4 as per the reaction: 3MnO2– The reaction can go to completion by removing OH– ions by adding |
Answer |
|
The correct order of $\text{E}_{\text{M}^{2+}/\text{M}}^o$ values with negative sign for the four successive elements Cr, Mn, Fe and Co is |
Answer |
|
Extraction for zinc blende is achieved by |
Answer |
|
Gold is extracted by hydro metallurgical process, based on its property |
Answer |
|
Which pair of compounds is expected to show similar colour in aqueous medium? |
Answer |
|
Least paramagnetic property is shown by |
Answer |